0001564590-20-051977 | 10-Q | XBRL Viewer

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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2020	Nov. 01, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Trading Symbol	CMBM
Entity Registrant Name	CAMBIUM NETWORKS CORP
Entity Central Index Key	0001738177
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		25,708,837
Entity Current Reporting Status	Yes
Entity File Number	001-38952
Entity Address, Address Line One	3800 Golf Road
Entity Address, Address Line Two	Suite 360
Entity Address, City or Town	Rolling Meadows
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60008
City Area Code	345
Local Phone Number	943-3100
Entity Incorporation State Country Code	E9
Document Quarterly Report	true
Document Transition Report	false
Title of 12(b) Security	Ordinary shares, $0.0001 par value
Security Exchange Name	NASDAQ

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets
Cash	$ 50,120	$ 19,346
Receivables, net of allowances	53,866	58,628
Inventories, net	29,054	41,670
Recoverable income taxes	361
Prepaid expenses	4,036	5,323
Other current assets	5,074	4,350
Total current assets	142,511	129,317
Noncurrent assets
Property and equipment, net	7,627	8,314
Software, net	3,045	3,395
Operating lease assets	5,494	6,872
Intangible assets, net	13,446	15,100
Goodwill	9,842	8,552
Deferred tax assets, net	1,276	929
Other noncurrent assets	291
TOTAL ASSETS	183,532	172,479
Current liabilities
Accounts payable	25,107	25,214
Accrued liabilities	19,771	15,034
Employee compensation	9,169	4,652
Current portion of long-term external debt, net	9,454	9,454
Deferred revenues	6,731	7,430
Other current liabilities	6,218	6,084
Total current liabilities	76,450	67,868
Noncurrent liabilities
Long-term external debt, net	47,068	54,158
Deferred revenues	4,278	4,852
Noncurrent operating lease liabilities	3,689	5,335
Deferred tax liabilities, net		337
Other noncurrent liabilities	1,451
Total liabilities	132,936	132,550
Shareholders' equity
Share capital; $0.0001 par value; 500,000,000 shares authorized at December 31, 2019 and September 30, 2020; 25,753,603 shares issued and 25,672,983 outstanding at December 31, 2019 and 25,791,702 shares issued and 25,700,741 outstanding at September 30, 2020	3	3
Additional paid in capital	107,641	104,773
Treasury shares, at cost, 80,620 shares at December 31, 2019 and 90,961 shares at September 30, 2020	(1,063)	(1,094)
Accumulated deficit	(55,305)	(63,374)
Accumulated other comprehensive loss	(680)	(379)
Total shareholders' equity	50,596	39,929
TOTAL LIABILITIES AND EQUITY	$ 183,532	$ 172,479

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	25,791,702	25,753,603
Common stock, shares, outstanding	25,700,741	25,672,983
Treasury stock, shares	90,961	80,620

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Revenues	$ 72,971	$ 65,703	$ 195,654	$ 202,966
Cost of revenues	36,902	33,871	98,481	105,032
Gross profit	36,069	31,832	97,173	97,934
Operating expenses
Research and development	10,213	9,895	31,326	35,566
Sales and marketing	8,293	10,363	26,632	34,808
General and administrative	8,604	5,996	21,675	24,189
Depreciation and amortization	1,643	1,449	5,038	3,957
Total operating expenses	28,753	27,703	84,671	98,520
Operating income (loss)	7,316	4,129	12,502	(586)
Interest expense, net	1,259	2,105	4,129	6,674
Other expense, net	318	61	80	251
Income (loss) before income taxes	5,739	1,963	8,293	(7,511)
Provision for income taxes	144	3	224	9,041
Net income (loss)	$ 5,595	$ 1,960	$ 8,069	$ (16,552)
Earnings (loss) per share
Basic	$ 0.22	$ 0.08	$ 0.31	$ (0.93)
Diluted	$ 0.21	$ 0.08	$ 0.31	$ (0.93)
Weighted-average number of shares outstanding to compute net earnings (loss) per share
Basic	25,691,357	25,634,417	25,683,969	17,743,703
Diluted	26,346,673	25,634,417	25,867,164	17,743,703

Condensed Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based compensation included in costs and expenses	$ 954	$ 828	$ 2,705	$ 16,906
Cost of Revenues
Share-based compensation included in costs and expenses	16	14	51	196
Research and Development
Share-based compensation included in costs and expenses	396	199	1,186	5,062
Sales and Marketing
Share-based compensation included in costs and expenses	251	374	726	3,981
General and Administrative
Share-based compensation included in costs and expenses	$ 291	$ 241	$ 742	$ 7,667

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 5,595	$ 1,960	$ 8,069	$ (16,552)
Other comprehensive (loss) income
Foreign currency translation adjustment	103	(166)	(301)	(140)
Comprehensive income (loss)	$ 5,698	$ 1,794	$ 7,768	$ (16,692)

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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+ Details

Condensed Consolidated Statements of Shareholders' (Deficit) Equity - USD ($) $ in Thousands	Total	Share Capital	Additional Paid in Capital	Capital Contribution	Treasury Shares	Accumulated Deficit	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2018	$ (20,571)		$ 772	$ 24,651		$ (45,773)	$ (221)
Beginning balance, shares at Dec. 31, 2018		77,000
Net income (loss)	(16,552)					(16,552)
Share-based compensation	16,906		16,906
Issuance of shares in Recapitalization and related reclassification	2	$ 2	24,651	$ (24,651)
Issuance of shares in Recapitalization and related reclassification, shares		19,848,000
Issuance of shares in initial public offering, net of issuance costs	61,374	$ 1	61,373
Issuance of shares in initial public offering, net of issuance costs, shares		5,800,000
Treasury shares withheld for net settlement in Recapitalization	(804)		290		$ (1,094)
Treasury shares withheld for net settlement in Recapitalization, shares		(91,000)
Foreign currency translation adjustment	(140)						(140)
Ending balance at Sep. 30, 2019	40,215	$ 3	103,992		(1,094)	(62,325)	(361)
Ending balance, shares at Sep. 30, 2019		25,634,000
Beginning balance at Jun. 30, 2019	37,933	$ 3	103,543		(1,133)	(64,285)	(195)
Beginning balance, shares at Jun. 30, 2019		25,632,000
Net income (loss)	1,960					1,960
Share-based compensation	828		828
Additional issuance costs in initial public offering	(361)		(361)
Treasury shares withheld for net settlement in Recapitalization	21		(18)		39
Treasury shares withheld for net settlement in Recapitalization, shares		2,000
Foreign currency translation adjustment	(166)						(166)
Ending balance at Sep. 30, 2019	40,215	$ 3	103,992		(1,094)	(62,325)	(361)
Ending balance, shares at Sep. 30, 2019		25,634,000
Beginning balance at Dec. 31, 2019	39,929	$ 3	104,773		(1,094)	(63,374)	(379)
Beginning balance, shares at Dec. 31, 2019		25,672,983
Net income (loss)	8,069					8,069
Share-based compensation	2,705		2,705
Issuance of vested shares, shares		24,000
Treasury shares withheld for net settlement in Recapitalization	31				31
Treasury shares withheld for net settlement in Recapitalization, shares		(10,000)
Share options exercised	$ 163		163
Share options exercised, shares	13,594	13,594
Foreign currency translation adjustment	$ (301)						(301)
Ending balance at Sep. 30, 2020	50,596	$ 3	107,641		(1,063)	(55,305)	(680)
Ending balance, shares at Sep. 30, 2020		25,700,741
Beginning balance at Jun. 30, 2020	43,796	$ 3	106,524		(1,048)	(60,900)	(783)
Beginning balance, shares at Jun. 30, 2020		25,684,000
Net income (loss)	5,595					5,595
Share-based compensation	954		954
Issuance of vested shares, shares		4,000
Treasury shares withheld for net settlement in Recapitalization	(15)				(15)
Treasury shares withheld for net settlement in Recapitalization, shares		(1,000)
Share options exercised	163		163
Share options exercised, shares		14,000
Foreign currency translation adjustment	103						103
Ending balance at Sep. 30, 2020	$ 50,596	$ 3	$ 107,641		$ (1,063)	$ (55,305)	$ (680)
Ending balance, shares at Sep. 30, 2020		25,700,741

Condensed Consolidated Statements of Shareholders' (Deficit) Equity (Parenthetical) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Statement Of Stockholders Equity [Abstract]
Share issuance costs	$ 7,866

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net (loss) income	$ 8,069	$ (16,552)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation	2,817	2,633
Amortization of software and intangible assets	2,688	1,688
Amortization of debt issuance costs	409	1,005
Share-based compensation	2,705	16,906
Deferred income taxes	(684)	7,499
Provision for inventory excess and obsolescence	1,933	325
Other	571	81
Change in assets and liabilities:
Receivables	7,931	653
Inventories	10,567	(8,662)
Accounts payable	175	(1,657)
Accrued employee compensation	5,313	343
Accrued liabilities	(147)	164
Accrued Sponsor interest and payables		(5,457)
Other assets and liabilities	(528)	(1,561)
Net cash (used in ) provided by operating activities	41,819	(2,592)
Cash flows from investing activities:
Purchase of property and equipment	(2,432)	(2,535)
Purchase of software	(921)	(872)
Cash paid for acquisition	(334)	(2,000)
Net cash used in investing activities	(3,687)	(5,407)
Cash flows from financing activities:
Proceeds from issuance of revolver debt	10,000
Repayment of term loan	(7,500)	(27,837)
Repayment of revolver debt	(10,000)	(10,000)
Payment of debt issuance costs		(336)
Proceeds from initial public offering, net of underwriting commission and fees		65,988
Taxes paid from shares withheld	31	(802)
Proceeds from share option exercises	163
Payment of deferred offering costs		(4,435)
Net cash provided by (used in) financing activities	(7,306)	22,578
Effect of exchange rate on cash	(52)	(70)
Net increase in cash	30,774	14,509
Cash, beginning of period	19,346	4,441
Cash, end of period	50,120	18,950
Supplemental disclosure of cash flow information:
Income taxes paid	1,626	1,432
Interest paid	$ 3,138	5,270
Significant non-cash activities:
Issuance of shares for unreturned capital and accumulated yield		49,252
Deferred offering costs included in accrued liabilities		$ 179

Business and Significant Accounting Policies

9 Months Ended

Sep. 30, 2020

Accounting Policies [Abstract]

Business and significant accounting policies

Note 1. Business and significant accounting policies

Business

Cambium Networks Corporation (“Cambium” or the “Company”), incorporated under the laws of the Cayman Islands, is a holding company whose principal operating entities are Cambium Networks, Ltd. (UK), Cambium Networks, Inc. (USA), and Cambium Networks Private Limited (India). On October 28, 2011, Cambium acquired the point-to-point (“PTP”) and point-to-multi-point (“PMP”) businesses from Motorola Solutions, Inc. The acquisition was funded by investment funds affiliated with Vector Capital (“Sponsor”) and Cambium became the renamed entity subsequent to the acquisition.

Cambium Networks Corporation and its wholly owned subsidiaries provide wireless broadband networking solutions for network operators, including medium-sized wireless internet service providers, enterprises and government agencies.

Basis of Presentation

The unaudited condensed consolidated financial statements include the accounts of Cambium Networks Corporation and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated. The condensed consolidated financial statements as of September 30, 2020, and for the three-month and nine-month periods ended September 30, 2019 and 2020, and the related notes are unaudited. The unaudited condensed consolidated financial statements have been prepared on the same basis as the annual audited consolidated financial statements, and, in the opinion of management, reflect all adjustments, which comprise only normal recurring adjustments necessary to state fairly the Company’s financial position as of September 30, 2020 and results of operations for the three-month and nine-month periods ended September 30, 2019 and 2020 and cash flows for the nine-month periods ended September 30, 2019 and 2020. The condensed consolidated balance sheet as of December 31, 2019 has been derived from the audited financial statements at that date.

Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principals generally accepted in the United States (“U.S. GAAP”) have been condensed or omitted. The condensed consolidated financial statements contained herein should be read in conjunction with the consolidated financial statements and related notes thereto for the year ended December 31, 2019 included in the Company’s annual report on Form 10-K and filed with the SEC on March 23, 2020. The results of operations for the three-month and nine-month periods ended September 30, 2020 are not necessarily indicative of the operating results to be expected for the full year.

The Company has reclassified certain prior period amounts in the condensed consolidated statement of cash flows to conform to the current period’s presentation. Specifically, within the condensed consolidated statements of cash flows, the provision for inventory excess and obsolescence has been reclassified from “Other” to “Provision for inventory excess and obsolescence”. This change in classification does not affect previously reported cash flows from operating activities in the condensed consolidated statements of cash flows.

Update to Significant Accounting Policies

There have been no material changes to the Company’s signifiant accounting policies disclosed in the 2019 Form 10-K, Part II, Item 8.

Receivables and concentration of credit risk

Trade accounts receivable are recorded at invoiced amounts, net of the allowance for credit losses. The Company considers the credit risk of all customers and regularly monitors credit risk exposure in its trade receivables. The Company’s standard credit terms with its customers are generally net 30 to 60 days. The Company had one customer representing more than 10% of trade receivables at December 31, 2019 and one customer at September 30, 2020. The Company had two customers representing more than 10% of revenues for the three-month period ended September 30, 2019 and two customers representing more than 10% of revenues for the three-month period ended September 30, 2020. The Company had two customers representing more than 10% of revenues for the nine-month period ended September 30, 2019 and two customers representing more than 10% of revenues for the nine-month period ended September 30, 2020.

The Company establishes an allowance for credit losses to present the net amount of accounts receivable expected to be collected. The allowance is determined by using the loss-rate method, which requires an estimation of loss rates based upon historical loss experience adjusted for factors that are relevant to determining the expected collectability of accounts receivables. Some of these factors include macroeconomic conditions that correlate with historical loss experience, delinquency trends, aging behavior of receivables, and credit and liquidity indicators for individual customers.

Recently adopted accounting pronouncements

In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Intruments, and subsequent amendments to the initial guidance: ASUs 2018-19, 2019-04, 2019-05, 2019-11, and 2020-02 (collectively, “Topic 326”). Topic 326 sets forth an expected credit loss model which requires the measurement of expected credit losses for financial instruments based on historical experience, current conditions and reasonable and supportable forecasts. This replaces the existing incurred loss model and is applicable to the measurement of credit losses on financial assets measured at amortized cost, including trade accounts receivable, and certain off-balance sheet credit exposures. The Company adopted Topic 326 on January 1, 2020 using the modified retrospective transition method for all financial assets measured at amortized costs, which is primarily trade accounts receivable. Results for reporting periods beginning after January 1, 2020 are presented under Topic 326 while prior period amounts continue to be reported in accordance with previously applicable U.S. GAAP. The adoption of Topic 326 did not have a material impact on the condensed condolidated financial statements.

In August 2018, the FASB issued ASU 2018-15, Intangibles – Goodwill and Other Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs incurred in a Cloud Computing Arrangement That is a Service Contract. The amendments in this update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this update. The Company adopted this ASU effective January 1, 2020 applying the changes prospectively to all implemenation costs incurred after this date. The adoption of ASU 2018-15 did not have a material impact on the condensed consolidated financial statements as there are no large implementations planned for 2020.

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. This update provides optional expedients and exceptions for applying generally accepted accounting principles to certain contract modification and hedging relationships that reference London Inter-bank Offered Rate (LIBOR) or another reference rate that is expected to be discontinued. The guidance is effective for all entities as of March 12, 2020 through December 31, 2022, when the reference rate replacement activity is expected to be completed. The adoption of ASU 2020-04 did not have an impact on the condensed consolidated financial statements.

Recently issued accounting pronouncements not yet adopted

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, as part of its Simplification Initiative to reduce the cost and complexity in accounting for income taxes. ASU 2019-12 removes certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period, and the recognition of deferred tax liabilities for outside basis differences. ASU 2019-12 also amends other aspects of the guidance to help simplify and promote consistent application of GAAP. The guidance is effective for interim and annual periods beginning after December 15, 2020, with early adoption permitted. The Company is assessing the impact of adopting this standard on its condensed consolidated financial statements.

Business Combinations

9 Months Ended

Sep. 30, 2020

Business Combinations [Abstract]

Business Combinations

Note 2. Business Combinations

In August 2019, the Company acquired select assets and assumed select liabilities of the Xirrus Wi-Fi products and cloud services business from Riverbed Technology, Inc. Xirrus has a portfolio of high performance enterprise Wi-Fi access points and subscription services. The Company paid $2.0 million upon closing and through February 2020, paid the entire additional $3.0 million contingent consideration that was subject to attaining certain booking targets related to sales of Xirrus products, which targets were met by Decemebr 31, 2019. This acquisition will enhance and accelerate the Company’s existing network service application capabilities.

The Company accounts for business combinations in accordance with ASC 805, Business Combinations. The Company recorded the acquisition using the acquisition method of accounting and recognized assets and liabilities at their fair value as of the date of acquisition. The Company based its preliminary allocation of the puchase price on estimates and assumptions known at the date of acquisition that are subject to change within the purchase price allocation period, which is generally one year from the acquisition date. The Company’s review of the purchase price allocation was completed in the period ended June 30, 2020. The Company determined the estimated fair value of identifiable intangible assets acquired primarily using an income approach.

The following table summarizes the final allocation of the purchase price (in thousands):

Goodwill	$	1,782
Customer relationships		7,670
Unpatented technology		540
Deferred revenue		(7,460	)
Other net assets acquired		2,468
Total purchase price	$	5,000

The results from this acquisition have been included in the Company’s condensed consolidated financial statements since the closing of the acquisition.

Fair value

9 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Fair value

Note 3. Fair value

The fair value of the Company’s external debt under its Credit Agreement approximates its carrying value because the terms and conditions approximate the terms and conditions of current market debt available to the Company. Due to the floating interest rate the debt is classified as Level 2 of the fair value hierarchy. The external debt was estimated based on the current rates offered to the Company for debt with the same remaining maturities. The fair value of the Company’s Credit Agreement was $65.3 million and $57.8 million as of December 31, 2019 and September 30, 2020, respectively.

The fair value of cash approximates its carrying value (Level 1 of the fair value hierarchy).

The Company’s Level 3 liability for contingent consideration of $3.0 million that was added during the three-month period ended September 30, 2019 was fully paid to Riverbed Technology, Inc. as of February 2020 in consideration for the sale to the Company of the Xirrus business. The entire $3.0 million was earned as of December 31, 2019 and the Company made a payment of $2.7 million in November 2019 and paid the remaining $0.3 million in February 2020.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Balance Sheet Components

9 Months Ended

Sep. 30, 2020

Balance Sheet Related Disclosures [Abstract]

Balance sheet components

Note 4. Balance sheet components

Accounts Receivable, net

The Company’s accounts receivable arises from sales on credit to customers. The Company establishes an allowance for credit losses to present the net amount of accounts receivable expected to be collected. With the adoption of Topic 326 on January 1, 2020, the allowance is determined by using the loss-rate method, which requires an estimation of loss rates based upon historical loss experience adjusted for factors that are relevant to determining the expected collectability of accounts receivables. Some of these factors include macroeconomic conditions that correlate with historical loss experience, delinquency trends, aging behavior of receivables and credit and liquidity indicators for individual customers. Prior to the adoption, the Company established the allowance under an incurred loss mode, considering the aging of the accounts receivable, the credit worthiness of each distributor based on payment history, and general economic factors, among other factors.

The components of accounts receivable, net are as follows (in thousands):

	December 31,			September 30,
	2019			2020
				(unaudited)
Trade accounts receivable	$	58,774		$	54,322
Other receivables		434			454
Total receivables		59,208			54,776
Less: Allowance for credit losses		(580	)		(910	)
Receivables, net	$	58,628		$	53,866

The allowance for credit losses activity was as follows (in thousands):

	Year ended December 31,			Nine months ended September 30,
	2019			2020
				(unaudited)
Beginning balance	$	503		$	580
Increase, charged to expense		333			210
Recoveries		(204	)		(71	)
Provision for late fee charges		—			191
Amounts written-off		(52	)		—
Ending balance	$	580		$	910

Inventories, net

Inventories, net consisted of the following (in thousands):

	December 31,			September 30,
	2019			2020
				(unaudited)
Finished goods	$	42,402		$	29,046
Raw materials		4,227			5,900
Gross inventory		46,629			34,946
Less: Excess and obsolete provision		(4,959	)		(5,892	)
Inventories, net	$	41,670		$	29,054

The following table reflects the activity in the Company’s inventory excess and obsolete provision (in thousands):

	Year ended December 31,			Nine months ended September 30,
	2019			2020
				(unaudited)
Beginning balance	$	3,950		$	4,959
Inventory written off		(149	)		(1,537	)
Increase in excess and obsolete provision		1,158			2,470
Ending balance	$	4,959		$	5,892

Accrued liabilities

Accrued liabilities consisted of the following (in thousands):

	December 31,		September 30,
	2019		2020
			(unaudited)
Accrued goods and services	$	8,364	$	8,436
Accrued inventory purchases		3,094		4,261
Accrued customer rebates		3,569		7,064
Other		7		10
Accrued liabilities	$	15,034	$	19,771

Accrued warranty

Provisions for warranty claims are primarily related to our hardware products and are recorded at the time products are sold. The change to accrued warranty was as follows (in thousands):

	Year ended December 31,		Nine months ended September 30,
	2019		2020
			(unaudited)
Beginning balance	$	488	$	706
Warranties assumed due to acquisition		180		1,174
Fulfillment of assumed acquisition warranty		—		(387	)
Provision increase, net		38		282
Ending balance	$	706	$	1,775

At December 31, 2019, $0.7 million is included in Other current liabilities on the Company’s condensed consolidated balance sheet. At September 30, 2020, $1.1 million is included in Other current liabilities and $0.7 million is included in Other noncurrent liabilities on the Company’s condensed consolidated balance sheet.

Property and equipment

9 Months Ended

Sep. 30, 2020

Property Plant And Equipment [Abstract]

Property and equipment

Note 5. Property and equipment

Property and equipment, net consisted of the following (in thousands):

		December 31,			September 30,
	Useful Life	2019			2020
					(unaudited)
Equipment and tooling	3 to 5 years	$	22,150		$	23,729
Computer equipment	3 to 5 years		2,888			3,039
Furniture and fixtures	10 years		749			742
Leasehold improvements	2 to 3 years		—			282
Total cost			25,787			27,792
Less: Accumulated depreciation			(17,473	)		(20,165	)
Property and equipment, net		$	8,314		$	7,627

Total depreciation expense was $0.9 million and $0.9 million for the three-month periods ended September 30, 2019 and 2020, respectively and $2.6 million and $2.8 million for the nine-month periods ended September 30, 2019 and 2020, respectively.

Software

9 Months Ended

Sep. 30, 2020

Research And Development [Abstract]

Software

Note 6. Software

Software consisted of the following (in thousands):

		December 31, 2019							September 30, 2020
	Useful Life	Gross carrying amount		Accumulated amortization			Net balance		Gross carrying amount		Accumulated amortization			Net balance
									(unaudited)		(unaudited)			(unaudited)
Acquired and Software for internal use	3 to 7 years	$	15,870	$	(13,471	)	$	2,399	$	15,678	$	(14,032	)	$	1,646
Software marketed for external sale	3 years		1,805		(809	)		996		2,675		(1,276	)		1,399
Total		$	17,675	$	(14,280	)	$	3,395	$	18,353	$	(15,308	)	$	3,045

Amortization of acquired and internal use software is computed using the straight-line method over an estimated useful life of generally three to seven years. Amortization expense recognized on acquired and internal use software is reflected in depreciation and amortization in the condensed consolidated statements of operations. Amortization expense was $0.1 million and $0.2 million for the three-month periods ended September 30, 2019 and 2020, respectively, and $0.3 million and $0.6 million for the nine-month periods ended September 30, 2019 and 2020, respectively.

Amortization expense recognized on software to be sold or marketed externally was $0.2 million and $0.2 million for the three-month periods ended September 30, 2019 and 2020, respectively, and $0.4 million and $0.5 million for the nine-month periods ended September 30, 2019 and 2020, respectively, and is included in cost of revenues on the condensed consolidated statements of operations.

Based on capitalized software assets at September 30, 2020, estimated amortization expense in future fiscal years is as follows (unaudited and in thousands):

Year ending December 31,	Acquired and internal use software		Software marketed for external use		Total
2020 (October - December)	$	180	$	184	$	364
2021		683		555		1,238
2022		411		395		806
2023		162		234		396
2024		68		31		99
Thereafter		142		—		142
Total amortization	$	1,646	$	1,399	$	3,045

Goodwill and Intangible Assets

9 Months Ended

Sep. 30, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Note 7. Goodwill and Intangible Assets

When the Company acquired the trade assets of Motorola Solutions, Inc.’s wireless point-to-point and point-to-multi-point businesses, the transaction generated goodwill and certain intangible assets. The goodwill associated with this transaction was recorded by Cambium Networks Corporation and allocated to Cambium Networks, Ltd. and Cambium Networks, Inc. using a revenue and asset allocation method. Although goodwill has been allocated to two operating subsidiaries, as noted in Note 16 – Segment information and revenues by geography, the Company operates as one operating segment and one reporting unit and therefore, goodwill is reported, and impairment testing performed, at the Cambium Networks Corporation consolidated level.

See Note 2 – Business combinations for further information regarding the acquisition completed during 2019.

The change in the carrying amount of goodwill for the year ended and nine-month period ended was as follows (in thousands):

	December 31,		September 30,
	2019		2020
			(unaudited)
Beginning balance	$	8,060	$	8,552
Additions attributable to acquisition		492		—
Acquisition adjustments		—		1,290
Ending balance	$	8,552	$	9,842

The Company tests goodwill and intangible assets for impairment annually on December 31 and more frequently if impairment indicators exist. Accordingly, the Company performs quarterly qualitative assessments of significant events and circumstances such as a reporting unit’s historical and current results, assumptions regarding future performance, strategic initiatives and overall economic factors, including the impact of the current global outbreak of the coronavirus (or COVID-19) and macro-economic developments, to determine the existence of potential indicators of impairment and assess if it is more likely than not that the fair value of the reporting unit or intangible asset is less than their carrying value. If indicators of impairment are identified, a quantitative impairment test is performed.

Qualitative assessments for the quarter did not indicate the existence of impairment indicators. Based on the operating results for the nine-month period ended September 30, 2020 and other considerations, the Company believes that it is more likely than not that the enterprise value for its one reporting unit and the fair value of intangibles is still greater than their carrying values. Accordingly, no goodwill impairment indicators were present at September 30, 2020 that would necessitate an interim impairment assessment. The Company will continue to monitor business performance and economic conditions, particularly the impact of the COVID-19 pandemic, throughout 2020 to determine if an interim evaluation should be conducted.

The useful life, gross carrying value, accumulated amortization, and net balance for each major class of definite-lived intangible assets at each balance sheet date were as follows (in thousands):

		December 31, 2019							September 30, 2020
	Useful Life	Gross carrying amount		Accumulated amortization			Net balance		Gross carrying amount		Accumulated amortization			Net balance
									(unaudited)		(unaudited)			(unaudited)
Unpatented technology	3 - 7 years	$	14,660	$	(14,195	)	$	465	$	14,660	$	(14,330	)	$	330
Customer relationships	5 - 18 years		19,300		(5,631	)		13,669		19,300		(6,754	)		12,546
Patents	7 years		11,300		(11,300	)		—		11,300		(11,300	)		—
Trademarks	10 years		5,270		(4,304	)		966		5,270		(4,700	)		570
Total		$	50,530	$	(35,430	)	$	15,100	$	50,530	$	(37,084	)	$	13,446

Intangible assets are amortized over their expected useful life and none are expected to have a significant residual value at the end of their useful life. Intangible assets amortization expense was $0.4 million and $0.6 million for the three-month periods ended September 30, 2019 and 2020, respectively, and $1.0 million and $1.7 million for the nine-month periods ended September 30, 2019 and 2020, respectively.

Based on capitalized intangible assets as of September 30, 2020, estimated amortization expense amounts in future fiscal years are as follows (unaudited and in thousands):

Year ending December 31,	Amortization
2020 (October - December)	$	552
2021		2,118
2022		1,603
2023		1,498
2024		1,498
Thereafter		6,177
Total amortization	$	13,446

Debt

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Debt

Note 8. Debt

As of September 30, 2020, the Company had $57.8 million outstanding under its current term loan facility and $0.0 million in borrowings under its revolving credit facility. The Company has available $10.0 million under its revolving credit facility (unaudited).

The following table reflects the current and noncurrent portions of the external debt facilities at December 31, 2019 and September 30, 2020 (in thousands):

	December 31,			September 30,
	2019			2020
				(unaudited)
Term loan facility	$	65,250		$	57,750
Less debt issuance costs		(1,638	)		(1,228	)
Total debt		63,612			56,522
Less current portion of term facility		(10,000	)		(10,000	)
Current portion of debt issuance costs		546			546
Total long-term external debt, net	$	54,158		$	47,068

Secured credit agreement

Both the term loan facility and the revolving credit facility mature on December 22, 2022. Following the completion of the Third Amendment (“Third Amendment”) to the December 21, 2017 credit agreement (as amended and restated, the “Credit Agreement”) entered into on June 28, 2019, the total term loan commitment was reduced to $70.0 million and the revolving agreement had an available commitment of $10.0 million.

Interest accrues on the outstanding principal amount of the term loan on a quarterly basis and is equal to the three-month USD LIBOR rate plus a base rate of 4.75%, 4.25%, or 4.00%. The rate on the term loan at December 31, 2019 was 6.85%, was reduced to 6.0% on March 31, 2020, and remains at 6.0% at September 30, 2020 as a result of resetting the LIBOR rate applicable to the loan. In addition to paying interest on the outstanding principal under the term loan facility, the Company is required to pay a commitment fee in respect of the unutilized commitments under the revolving credit facility, payable quarterly in arrears. The Company is also required to pay letter of credit fees on the maximum amount available to be drawn under all outstanding letters of credit in an amount equal to the applicable margin on LIBOR based borrowings under the revolving credit facility on a per annum basis, payable in arrears, as well as customer fronting fees for the issuance of letters of credit and agency fees.

The Company is permitted to voluntarily reduce the unutilized portion of the commitment amount and repay outstanding loans under the Credit Agreement at any time without premium or penalty, other than customary breakage costs with respect to LIBOR based loans.

Maturities on the external debt outstanding at September 30, 2020 is as follows (unaudited and in thousands):

Year ending December 31,
2020 (October - December)	$	2,500
2021		10,000
2022		45,250
Total	$	57,750

Borrowings under the Credit Agreement are secured by a first-priority lien on substantially all of the Company’s assets, the equity interests in the Company’s subsidiaries, and any intercompany debt. The Credit Agreement contains certain customary affirmative and negative covenants that are usual and customary for companies with similar credit ratings. As of September 30, 2020, the Company was in compliance with all affirmative and negative covenants (unaudited).

The Company’s current debt covenant requirements for the next four quarters reflect the following limits, based on the time period noted, for compliance with the covenant.:

		Quarter ending
Covenant	Criteria		December 31, 2020	March 31, 2021	June 30, 2021	September 30, 2021
Monthly minimum adjusted quick ratio	Min ratio	Non quarter-end months 1.00:1.00 Quarter-end months 1.15:1.00
Quarterly consolidated fixed charge coverage ratio	Min ratio		1.25:1.00	1.25:1.00	1.25:1.00	1.25:1.00
Quarterly consolidated fixed charge coverage ratio	Time period	Trailing twelve-month
Quarterly consolidated leverage ratio	Max ratio		2.50:1.00	2.25:1.00	2.25:1.00	2.00:1.00
Quarterly consolidated leverage ratio	Time period	Trailing twelve-month

Expected Discontinuation of LIBOR

In July 2017, the United Kingdom’s Financial Conduct Authority, which regulates LIBOR, announced it will no longer compel banks to submit rates for the calculation of LIBOR after 2021. The Alternative Reference Rates Committee has proposed the Secured Overnight Financing Rate (“SOFR”) as its recommended alternative to LIBOR, and the first publication of SOFR rates was released in April 2018.

The Company is evaluating the potential impact of the transition from LIBOR as an interest rate benchmark to other potential alternative reference rates, including SOFR. The Company’s Credit Agreement is currently indexed to LIBOR and the maturity date of the Credit Agreement extends beyond 2021. The Credit Agreement contemplates the discontinuation of LIBOR and provides options for the Company in such an event. The Company will continue to actively assess the related opportunities and risks involved in this transition.

Net interest expense, including bank charges and amortization of debt issuance costs on the external debt, was $2.1 million and $1.2 million for the three-month period ended September 30, 2019 and 2020, respectively, and $6.7 million and $4.1 million for the nine-month periods ended September 30, 2019 and 2020, respectively.

Employee Benefit Plans

9 Months Ended

Sep. 30, 2020

Compensation And Retirement Disclosure [Abstract]

Employee benefit plans

Note 9. Employee benefit plans

The Company’s employee benefit plans currently consist of a defined contribution plan in the United States and a separate defined contribution plan in the UK. The Company does not offer any other postretirement benefit plans, such as retiree medical and dental benefits or deferred compensation agreements to its employees or officers.

U.S. plan

U.S. regular, full-time employees are eligible to participate in the Cambium Networks, Inc. 401(k) Plan, which is a qualified defined contribution plan under section 401(k) of the Internal Revenue Service Code. Under the Cambium Networks, Inc. 401(k) Plan, the Company contributes a dollar-for-dollar match of the first 4% an employee contributes to the plan. Employees are eligible to participate on the first day of the month following their date of hire and begin receiving company contributions three-months after they become eligible to participate in the plan. Company matching contributions are made each pay period, but the funds do not vest until the employee’s second anniversary of employment with the Company. Employees are always fully vested in their own contributions. All contributions, including the Company match, are made in cash and invested in accordance with the participants’ investment elections. Contributions made by the Company under the Cambium Networks, Inc. 401(k) Plan were $0.2 million and $0.3 million for the three-month periods ended September 30, 2019 and 2020, respectively, and $0.7 million and $0.8 million for the nine-month periods ended September 30, 2019 and 2020, respectively.

UK plan

Regular, full-time UK employees are eligible to participate in the Cambium Networks Ltd. Stakeholder Pension Scheme, which is a qualified defined contribution plan. Employees are eligible to participate on the first of the month following receipt of their enrollment form, and eligible employees are automatically enrolled in the plan at a default employee contribution rate of 3% and a company contribution rate of 5% of the employee’s basic salary. The Company contribution rate increases by 1% for each additional 1% that the employee contributes up to a maximum of 7%. Company matching contributions vest immediately and employees are always vested in their own contributions. All contributions, including the Company match, are made in cash and deposited in the participant’s account each pay period. The total contributed by the Company under this plan was $0.1 million and $0.1 million for the three-month periods ended September 30, 2019 and 2020, respectively, and $0.3 million and $0.3 million for the nine-month periods ended September 30, 2019 and 2020, respectively.

- Definition

The entire disclosure for retirement benefits.

+ References

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+ Details

Other Expense

9 Months Ended

Sep. 30, 2020

Other Income And Expenses [Abstract]

Other expense

Note 10. Other expense

Net other expense was $0.1 million and $0.3 million for the three-month periods ended September 30, 2019 and 2020, respectively, and $0.3 million and $0.1 million for the nine-month periods ended September 30, 2019 and 2020, respectively, and represents foreign exchange gains and losses.

Share-Based Compensation

9 Months Ended

Sep. 30, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Share-based compensation

Note 11. Share-based compensation

2019 Share incentive plan

In June 2019, the Company’s Board of Directors adopted, and its shareholders approved, the 2019 Share Incentive Plan (“2019 Plan”). The 2019 Plan provides for the grant of incentive share options, nonqualified share options, share appreciation rights, restricted share awards (“RSAs”), restricted share units (“RSUs”), other share-based awards and performance awards. The number of shares that were reserved for issuance under the 2019 Plan was 3,400,000, in addition to the 240,037 RSAs and RSUs the Company granted in substitution for unvested Class B Units or phantom units in Vector Cambium Holdings (Cayman), L.P. (“VCH L.P.”) in connection with the Company’s initial public offering (“IPO”) based on a price of $12.00 per share (“Recapitalization Awards”). The share reserve under the 2019 Plan will be automatically increased on the first day of each fiscal year, beginning with the fiscal year ending December 31, 2020 and continue until, and including, the fiscal year ending December 31, 2029. The number of shares added annually will be equal to the lowest of 1,320,000 shares, 5% of the number of the Company’s shares outstanding on the first day of such fiscal year, or an amount determined by the Board of Directors. On March 24, 2020, the Company registered 1,283,649 additional shares that may be issued under the 2019 Plan.

The Company’s employees, officers, directors, consultants, and advisors are eligible to receive awards under the 2019 Plan. Incentive share options, however, may only be granted to its employees. Participants in the 2019 Plan will also consist of persons to whom Recapitalization Awards were granted.

The following table summarizes changes in the number of shares available for grant under the Company’s equity incentive plans during the nine-month period ended September 30, 2020 (unaudited):

	Number of shares
Available for grant at December 31, 2019		426,022
Added to 2019 Share Incentive Plan		1,283,649
RSUs granted		(506,500	)
Options granted		(560,000	)
Shares withheld in settlement of taxes		10,341
Forfeitures		160,250
Available for grant at September 30, 2020		813,762

Share-based compensation

The following table shows total share-based compensation expense for the three-month and nine-month periods ended September 30, 2019 and 2020 (unaudited and in thousands):

	Three Months Ended September 30				Nine Months Ended September 30,
	2019		2020		2019		2020
Cost of revenues	$	14	$	16	$	196	$	51
Research and development		199		396		5,062		1,186
Sales and marketing		374		251		3,981		726
General and administrative		241		291		7,667		742
Total share-based compensation expense	$	828	$	954	$	16,906	$	2,705

For the three-month period ended September 30, 2019 and 2020, the Company recorded corresponding tax benefits of $0.1 million and $0.2 million, respectively, and for the nine-month period ended September 30, 2019 and 2020, the Company recorded corresponding tax benefits of $0.5 million and $0.5 million, respectively.

The Company began recognizing share-based compensation expense during the three-month period ended June 30, 2019, the period in which the Company completed its Recapitalization and IPO. As a result, the Company recorded a one-time expense of $15.4 million of share-based compensation expense during the three-month period ended June 30, 2019 related to the Recapitalization Awards.

As of September 30, 2020, the Company estimates the pre-tax unrecognized compensation expense of $13.4 million related to all unvested share-based awards, including share options, restricted share units and restricted share awards will be recognized through the second quarter of 2029. The Company expects to satisfy the exercise of share options and future distributions of shares for restricted share units and restricted share awards by issuing new ordinary shares which have been reserved under the 2019 Plan.

The Company utilized a forfeiture rate of 5% during the nine-month period ended September 30, 2020 for estimating the forfeitures of share options and restricted share units granted.

Share options

The following is a summary of option activity for the Company’s share incentive plans for the nine-month period ended September 30, 2020 (unaudited):

	Options			Weighted average exercise price		Weighted Average remaining contractual term (years)		Aggregate intrinsic value
Outstanding at December 31, 2019		2,920,500		$	10.40		9.6	$	1,932,000
Options granted		560,000		$	15.65		—	$	—
Options exercised		(13,594	)	$	12.00		—	$	—
Options forfeited		(160,250	)	$	10.76		—	$	—
Outstanding at September 30, 2020		3,306,656		$	11.26		9.1	$	18,548,215
Options exercisable at September 30, 2020		696,461		$	11.97		8.7	$	3,416,065
Options vested and expected to vest at September 30, 2020		3,119,588		$	11.24		9.1	$	17,576,131

Share options typically have a contractual term of ten years from grant date.

At September 30, 2020, the aggregate intrinsic value of options exercisable under the Company’s share incentive plans was $3.4 million. The Company had 13,594 options exercised during the nine-month period ended September 30, 2020.

At September 30, 2020, there was $11.2 million in unrecognized pre-tax share-based compensation expense, net of estimated forfeitures, related to unvested share option awards. The unrecognized share-based compensation expense is expected to be recognized through the third quarter of 2024.

The fair value of options granted are estimated on the date of grant using the Black-Scholes option pricing model. The fair value of share options is being amortized on a straight-line basis over the requisite service period of the awards. The fair value of share options is estimated using the following weighted-average assumptions (unaudited):

	For the nine months ended September 30,
	2019			2020
Expected dividend yield		—			—
Risk-free interest rate		1.82	%		0.39	%
Weighted-average expected volatility		40.8	%		50.0	%
Expected term (in years)		6.0			6.5
Weighted average grant-date fair value per share of options granted	$	5.00		$	7.56

Restricted shares

The following is a summary of restricted shares activity for the Company’s share incentive plans for the nine-month period ended September 30, 2020 (unaudited):

	Units			Weighted average grant date fair value
RSU and RSA balance at December 31, 2019		257,119		$	12.00
RSUs and RSAs granted		506,500		$	4.56
RSUs and RSAs vested		(18,055	)	$	12.00
RSUs and RSAs forfeited		(5,078	)	$	12.00
RSU and RSA balance at September 30, 2020		740,486		$	6.91
RSUs and RSAs expected to vest at September 30, 2020		740,486		$	6.91

During the nine-month period ended September 30, 2020, 506,500 RSUs were granted under the Company’s 2019 Share Incentive Plan and 18,055 RSUs vested. The Company withheld 3,889 of those shares to pay the employees’ portion of the minimum payroll withholding taxes.

As of September 30, 2020, there was $2.2 million in unrecognized pre-tax compensation expense, net of estimated forfeitures, related to unvested share awards. The unrecognized compensation expense is expected to be recognized through the second quarter of 2029.

Employee share purchase plan

In June 2019, the Company’s Board of Directors adopted, and its shareholders approved, the Employee Share Purchase Plan (“ESPP”). The ESPP was effective on June 25, 2019; however, no offering period or purchase period under the ESPP has begun as of September 30, 2020 and will only begin when determined by the Company’s Board of Directors. During 2019, a total of 550,000 shares were made available under the ESPP. Per the ESPP, the number of shares that will be available for sale also includes an annual increase on the first day of each fiscal year beginning in 2020, equal to the lesser of: 275,000 shares; 1% of the outstanding shares as of the last day of the immediately preceding fiscal year, or such other amount as the administrator may determine. The purchase price of the shares will be 85% of the lower of the fair market value of our shares on the first trading day of each offering period or on the purchase date. On March 24, 2020, the Company registered 256,730 additional shares for the year ending December 31, 2020 that may be issued under the ESPP.

Share Capital - Shares

9 Months Ended

Sep. 30, 2020

Stockholders Equity Note [Abstract]

Share capital - shares

Note 12. Share capital - shares

The following table reflects the share capital activity (unaudited):

	Number of shares			Value (in thousands)
Balance at December 31, 2019		25,672,983		$	3
Shares withheld for net settlement of shares issued		(10,341	)		—
Share options exercised		13,594			—
Issuance of vested shares		24,505			—
Balance at September 30, 2020		25,700,741		$	3

As of September 30, 2020, no dividends have been declared or paid.

Earnings Per Share

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Earnings per share

Note 13. Earnings per share

Basic net earnings (loss) per share is computed by dividing net income (loss) by the weighted-average number of shares outstanding during the period. Diluted net earnings per share is computed by giving effect to all potentially dilutive ordinary share equivalents outstanding for the period. For purposes of this calculation, share options, RSUs, and RSAs are considered to be ordinary share equivalents but are excluded from the calculation of diluted earnings (loss) per share when including them would have an anti-dilutive effect. The following table sets forth the computation of basic and diluted net earnings (loss) per share (unaudited and in thousands, except for share and per share data):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2020		2019			2020
Numerator:
Net income (loss)	$	1,960	$	5,595	$	(16,552	)	$	8,069
Denominator:
Basic weighted average shares outstanding		25,634,417		25,691,357		17,743,703			25,683,969
Dilutive effect of share option awards		—		281,244		—			—
Dilutive effect of restricted share units and restricted share awards		—		374,072		—			183,195
Diluted weighted average shares outstanding		25,634,417		26,346,673		17,743,703			25,867,164
Net earnings (loss) per share, basic	$	0.08	$	0.22	$	(0.93	)	$	0.31
Net earnings (loss) per share, diluted	$	0.08	$	0.21	$	(0.93	)	$	0.31

The following outstanding shares of ordinary share equivalents were excluded from the computation of diluted net loss per share for the periods presented because including them would have had an anti-dilutive effect (unaudited and in thousands):

	Three Months Ended September 30,					Nine Months Ended September 30,
	2019		2020		2019			2020
Share options		—		1,966			2,076		2,821
Restricted shares (RSUs and RSAs)		—		—			268		240
Total		—		1,966			2,344		3,061

Income Taxes

9 Months Ended

Sep. 30, 2020

Income Tax Disclosure [Abstract]

Income taxes

Note 14. Income taxes

The Company’s provision for income taxes is based upon estimated annual tax rates for the year applied to federal, state and foreign income. The Company recorded a provision for income taxes of $0.0 million and $0.1 million for the three-month periods ended September 30, 2019 and 2020, with an effective tax rate of 0.2 % and 2.5%, respectively. The Company recorded a provision for income taxes of $9.0 million and $0.2 million for the nine-month periods ended September 30, 2019 and 2020, with an effective tax rate of (120.4)% and 2.7%, respectively. The change in the effective tax rate from 0.2% for the three-month period ended September 30, 2019 to 2.5% for the three-month period ended September 30, 2020 was primarily due to the effects of higher income in the three-month period ended September 30, 2020 when compared to the three-month period ended September 30, 2019, and effects of changes to the valuation allowance. The change in the effective tax rate from (120.4)% for the nine-month period ended September 30, 2019 to 2.7% for the nine-month period ended September 30, 2020 was primarily due to the fact that the nine-month period ended September 30, 2019 included a tax expense due to the recognition of a valuation allowance against the UK deferred tax assets. For the three-month and nine-month periods ended September 30, 2020, the Company’s effective tax rate of 2.5 % and 2.7%, respectively, were different from the statutory rate of 21.0% primarily due to the utilization of previously unrecognized loss carryforwards in a foreign jurisdiction, resulting in recognition of a tax benefit.

On March 27, 2020, the Coronavirus Aid, Relief and Economic Security (“CARES”) Act was enacted and signed into U.S. law to provide emergency aid and health care for individuals and businesses affected by the COVID-19 pandemic, generally supporting the U.S. economy. The CARES Act, among other things, includes provisions related to deferral of the employer portion of social security payments, refundable payroll tax credits, net operating loss carryback limitations, modifications to the net interest deduction thresholds, and technical corrections to tax depreciation methods for qualified improvement property. The Company has chosen to take advantage of the deferral of the employer portion of social security payments and recorded the deferral as a noncurrent liability in the condensed consolidated balance sheets. The remaining provision of the CARES Act is not expected to apply, and the Company does not currently expect the Act to have a material impact on its consolidated financial condition or results of operations.

On July 22, 2020, the UK 2020 Finance Act became law. This new law raises the UK tax rate to 19% for all of 2020. The effects of this tax rate change on deferred tax assets is an increase to the asset of $0.9 million with an equal and offsetting increase in the valuation allowance, with an overall net impact of zero.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References + Details

Commitments and Contingencies

9 Months Ended

Sep. 30, 2020

Commitments And Contingencies Disclosure [Abstract]

Commitments and contingencies

Note 15. Commitments and contingencies

In accordance with ASC 460, Guarantees, the Company recognizes the fair value for guarantee and indemnification arrangements it issues or modifies, if these arrangements are within the scope of the interpretation. In addition, the Company must continue to monitor the conditions that are subject to the guarantees and indemnifications in order to identify if a loss has incurred. If the Company determines it is probable that a loss has occurred, then any such estimated loss would be recognized under those guarantees and indemnifications and would be recognized in the Company’s condensed consolidated statements of operations and corresponding condensed consolidated balance sheets during that period.

Indemnification

The Company generally indemnifies its distributors, value added reseller and network operators against claims brought by a third party to the extent any such claim alleges that the Company’s product infringes a patent, copyright or trademark or violates any other proprietary rights of that third party. Although the Company generally tries to limit the maximum amount of potential future liability under its indemnification obligations, in certain agreements this liability may be unlimited. The maximum potential amount of future payments the Company may be required to make under these indemnification agreements is not estimable.

The Company indemnifies its directors and officers and select key employees, including key employees serving as directors or officers of the Company’s subsidiaries, for certain events or occurrences, subject to certain limits, while the director or officer is or was serving at the Company’s request in such capacity. The term of the indemnification period is for the director’s or officer’s term of service. The Company may terminate the indemnification agreements with its directors, officers or key employees upon the termination of their services as directors or officers of the Company or its subsidiaries, or the termination of activities for which indemnification has been provided, but termination will not affect claims for indemnification related to events occurring prior to the effective date of termination. The maximum amount of potential future indemnification is unlimited; however, the Company has a director and officer insurance policy that limits it exposure. The Company believes the fair value of these indemnification agreements is minimal.

Warranties

The Company offers a standard warranty on its products, with the term depending on the product, and records a liability for the estimated future costs associated with potential warranty claims. The Company’s responsibility under its standard warranty is the repair or replacement of in-warranty defective product, or to credit the purchase price of the defective product, at its discretion, without charge to the customer. The Company’s estimate of future warranty costs is largely based on historical experience factors including product failure rates, material usage, and service delivery cost incurred in correcting product failures. The standard warranty is included in either Other current liabilities or Other noncurrent liabilities on its condensed consolidated balance sheets, depending on the time period covered by the warranty. The Company also offers an extended warranty for purchase that represents a future performance obligation for the Company. The extended warranty is included in deferred revenues (both current and noncurrent) on the condensed consolidated balance sheets and recognized on a straight-line basis over the term of the extended warranty. The warranty costs are reflected in the Company’s condensed consolidated statements of operations within cost of revenues.

Legal proceedings

Third parties may from time to time assert legal claims against the Company. The Company records accruals for loss contingencies to the extent that it concludes it is probable that a liability has been incurred and the amount of the related loss can be reasonably estimated. The Company evaluates, on a regular basis, developments in legal proceedings and other matters that could cause a change in amounts recorded. Due to the inherent uncertainty involving legal matters, the ultimate resolution could differ from amounts recorded. There is no pending or threatened legal proceedings to which the Company is a party to, that in the Company’s opinion, is likely to have a material adverse effect on its financial condition or results of operations.

On August 7, 2018, Ubiquiti Networks, Inc. filed a lawsuit in the United States District Court, Northern District of Illinois, against the Company, two of its employees, one of its distributors and one of its end users. The complaint alleged that the Company’s development of and sales and promotion of its Elevate software as downloaded on a Ubiquiti device violates the Computer Fraud and Abuse Act and Illinois Computer Crimes Prevention Law, the Digital Millennium Copyright Act and the Copyright Act and constitutes misrepresentation and false advertising and false designation of origin in violation of the Lanham Act and state competition laws, breach of contract, tortious interference with contract and unfair competition, and trademark infringement and common law misappropriation. The complaint also asserted additional claims against all defendants alleging that the development and sales of Elevate violated the Racketeer Influenced and Corrupt Organizations Act. On May 22, 2019, the Court issued its order dismissing Ubiquiti’s complaint without prejudice. On June 18, 2019, Ubiquiti filed its First Amended Complaint (FAC). The FAC made substantially the same claims against the same parties with the exception that the FAC does not include claims for violation of the Illinois Computer Crime Prevention Law, Infringement of Registered Trademarks, False Designation of Origin, and Common Law Trademark Misappropriation that were included in the initial complaint. The Company filed a motion to dismiss the FAC on July 10, 2019. On November 14, 2019 the Court issued an order denying its motion to dismiss. The Court ordered that fact discovery will close on December 1, 2020 and that dispositive motions must be filed prior to March 26, 2021. The Court referred the case to a magistrate judge for a settlement discussion. The parties are currently working with the magistrate judge on settlement discussions. The Company believes Ubiquiti’s claims are without merit and plans to vigorously defend against these claims; however, there can be no assurance that it will prevail in the lawsuit.

Segment Information and Revenues by Geography

9 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Segment information and revenues by geography

Note 16. Segment information and revenues by geography

The Company’s chief operating decision maker (“CODM”) is its Chief Executive Officer. The Company’s CODM reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. Accordingly, the Company determined that it operates as one operating segment and one reporting unit.

Revenues by product were as follows (unaudited and in thousands, except percentages):

	Three Months Ended September 30,								Nine Months Ended September 30,
	2019				2020				2019				2020
Point-to-Multi-Point	$	38,856	59	%	$	43,342	59	%	$	122,913	61	%	$	118,773	61	%
Point-to-Point		15,976	24	%		17,967	25	%		53,440	26	%		43,679	22	%
Wi-Fi		10,141	16	%		9,949	14	%		24,157	12	%		29,070	15	%
Other		730	1	%		1,713	2	%		2,456	1	%		4,132	2	%
Total Revenues	$	65,703	100	%	$	72,971	100	%	$	202,966	100	%	$	195,654	100	%

The Company’s products are predominately distributed through a third-party logistics provider in the United States, Netherlands and China. The Company has determined the geographical distribution of product revenues based upon the ship-to destinations.

Revenues by geography were as follows (unaudited and in thousands, except percentages):

	Three Months Ended September 30,								Nine Months Ended September 30,
	2019				2020				2019				2020
North America	$	29,032	44	%	$	38,656	53	%	$	93,452	46	%	$	102,145	52	%
Europe, Middle East and Africa		21,749	33	%		20,250	28	%		66,713	33	%		59,418	30	%
Caribbean and Latin America		8,008	12	%		9,138	12	%		23,527	12	%		19,021	10	%
Asia Pacific		6,914	11	%		4,927	7	%		19,274	9	%		15,070	8	%
Total Revenues	$	65,703	100	%	$	72,971	100	%	$	202,966	100	%	$	195,654	100	%

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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+ Details

Revenues from contracts with customers

9 Months Ended

Sep. 30, 2020

Revenue From Contract With Customer [Abstract]

Revenues from contracts with customers

Note 17. Revenues from contracts with customers

Revenues consist primarily of revenues from the sale of hardware products with essential embedded software. Revenues also include limited amounts for software products and extended warranty on hardware products. Substantially all products are sold through distributors and other channel partners, such as resellers and systems integrators.

In accordance with ASC 606, Revenue From Contracts with Customers, the Company recognizes revenue to reflect the transfer of control of promised products or services to a customer in an amount that reflects the consideration to which the Company expects to be entitled in exchange for products or services. Refer to Note 16 - Segment Information, for further details, including disaggregation of revenue based on product line and geographic location.

The Company accounts for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable.

The Company identifies its distinct performance obligations under each contract. A performance obligation is a promise in a contract to transfer a distinct product or service to the customer. Hardware products with essential embedded software, software products, and purchased extended warranty on hardware products have been identified as separate and distinct performance obligations.

The transaction price is the amount of consideration to which the Company expects to be entitled in exchange for transferring products or services to a customer. Exchanges made as part of the Company’s stock rotation program meet the definition of a right of return under ASC 606. An adjustment to revenue is made to adjust the transaction price to exclude the consideration related to products expected to be returned. The Company records an asset at the carrying amount of the estimated stock returns and a liability for the estimated amount expected to be refunded to the customer. The transaction price also excludes other forms of consideration provided to the customer, such as volume-based rebates and cooperative marketing allowances.

The Company recognizes revenue when, or as, it satisfies a performance obligation by transferring control of a promised product or service to a customer. Revenue from hardware products with embedded software transferred at a point in time is recognized when obligations under the terms of the contract are satisfied. Generally, this occurs when control of the asset is transferred, which is at the time of shipment. Software revenue is from perpetual license software and is recognized at the point in time that the customer is able to use or benefit from the software. Extended warranty on hardware products is a performance obligation that is satisfied over time, beginning on the effective date of the warranty period and ending on the expiration of the warranty period. The Company recognizes revenue on extended warranties on a straight-line basis over the warranty period.

The Company enters into revenue arrangements that may consist of multiple performance obligations, such as hardware with embedded essential software and extended warranty. The Company allocates the transaction price to each performance obligation on a relative standalone selling price basis for each distinct product or service in the contract. The best evidence of standalone selling price is the observable price of a product or service when the Company sells that product or service separately in similar circumstances and to simlar customers. If a standalone selling price is not directly observable, the Company estimates the transaction price allocated to each performance obligation using the expected costs plus a margin approach.

Contract Balances

The following table summarizes contract balances as of December 31, 2019 and September 30, 2020 (in thousands):

	December 31, 2019		September 30, 2020
			(unaudited)
Trade accounts receivable, net of allowance for doubtful accounts	$	58,254	$	53,472
Deferred revenue - current		7,430		6,731
Deferred revenue - noncurrent		4,852		4,278
Refund liability	$	2,223	$	2,119

Trade accounts receivable include amounts billed and currently due from customers. Amounts are billed in accordance with contractual terms and are recorded at face amount less an allowance for credit losses.

The Company had one customer representing more than 10% of trade receivables at December 31, 2019 and one customer representing more than 10% of trade receivables at September 30, 2020.

Deferred revenue consists of amounts due or received from customers in advance of the Company satisfying performance obligations under contractual arrangements. Deferred revenue is classified as current or noncurrent based on the timing of when revenue will be recognized. The changes in deferred revenue were due to normal timing differences between the Company’s performance and the customers’ payment.

The refund liability is the estimated amount expected to be refunded to customers in relation to product exchanges made as part of the Company’s stock rotation program and returns that have been authorized, but not yet received by the Company. It is included within Other current liabilities in the condensed consolidated balance sheets.

Remaining performance obligations

Remaining performance obligations represent the revenue that is expected to be recognized in future periods related to performance obligations included in a contract that are unsatisfied, or partially satisfied, as of the end of a period. As of December 31, 2019, deferred revenue (current and noncurrent) of $12.3 million represents the Company’s remaining performance obligations, of which $7.4 million is expected to be recognized within one year, with the remainder to be recognized thereafter. As of September 30, 2020, deferred revenue (current and noncurrent) of $11.0 million represents the Company’s remaining performance obligations, of which $6.7 million is expected to be recognized within one year, with the remainder to be recognized thereafter (unaudited).

Revenue recognized during the three and nine-month periods ended September 30, 2020 which was previously included in deferred revenues as of December 31, 2019 was $1.5 million and $6.3 million, respectively, compared to $0.4 million and $2.1 million of revenue recognized during the three and nine-month periods ended September 30, 2019, respectively, which was previously included in deferred revenues as of December 31, 2018. The increase in 2020 is driven by the addition of deferred revenue related to the acquisition of the Xirrus business (See Note 2 – Business Combinations).

Cost to obtain a contract

Sales commissions are incremental costs of obtaining a contract. The Company has elected to recognize these expenses as incurred due to the amortization period of these costs being one year or less.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 13
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+ Details

Leases

9 Months Ended

Sep. 30, 2020

Leases [Abstract]

Leases

Note 18. Leases

Right-of-use (“ROU”) assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at the commencement date. The Company’s lease payments are typically fixed or contain fixed escalators. The Company’s leases typically include certain lock-in periods and renewal options to extend the leases, but does not consider options to extend the lease it is not reasonably certain to exercise. The Company elected the practical expedient to not separate the lease and non-lease components of its leases and currently has no leases with options to purchase the leased property.

The components of lease expense were as follows and are included in general and administrative expense (unaudited and in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2020		2019		2020
Operating lease cost	$	596	$	643	$	1,773	$	1,935
Short-term lease cost		47		96		137		245
Variable lease costs		105		67		304		282
Total lease expense	$	748	$	806	$	2,214	$	2,462

Supplemental balance sheet information related to leases were as follows (in thousands, except lease term and discount rate):

	Balance Sheet Caption	December 31, 2019			September 30, 2020
					(unaudited)
Operating leases:
Operating lease assets	Operating lease assets	$	6,872		$	5,494
Current lease liabilities	Other current liabilities	$	2,125		$	2,284
Noncurrent lease liabilities	Noncurrent operating lease liabilities	$	5,335		$	3,689
Weighted average remaining lease term (years):
Operating leases			3.98			3.44
Weighted average discount rate:
Operating leases			8.50	%		8.36	%

Supplemental cash flow information related to leases were as follows (unaudited and in thousands):

	Nine Months Ended September 30,
	2019		2020
Supplemental cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$	1,910	$	1,937

The Company’s lease terms range from one to seven years and may include options to extend the lease by one to four years.

Remaining maturities on lease liabilities as of September 30, 2020 is as follows (unaudited and in thousands):

	Operating leases
2020 (October - December)	$	686
2021		2,515
2022		1,400
2023		1,305
2024		548
Thereafter		464
Total lease payments		6,918
Less: interest		945
Present value of lease liabilities	$	5,973

As of September 30, 2020, the Company does not have any additional leases for new office facilities that have not yet commenced.

Related Party Transactions

9 Months Ended

Sep. 30, 2020

Related party transactions

Note 19. Related party transactions

The Company follows ASC 850, Related Party Disclosures, for the identification of related parties and disclosure of related party transactions. A party is considered to be related to the Company if the party directly or indirectly or through one or more intermediaries, controls, is controlled by, or is under common control with the Company. Related parties also include principal owners of the Company, its management, members of the immediate families of principal owners of the Company and its management and other parties with which the Company may deal.

For the three-month periods ended September 30, 2019 and 2020, Vector Capital Management, LP, an entity related to the Company’s majority shareholder, charged $0.0 million and $0.0 million, respectively and $0.2 million and $0.0 million for the nine-month periods ended September 30, 2019 and 2020, respectively, for management and oversight fees. In connection with the IPO in June 2019, and the payment of all outstanding management and oversight fees, the Vector Capital Management Agreement was terminated, and no further management and oversight fees are payable by the Company.

Restructuring

9 Months Ended

Sep. 30, 2020

Restructuring And Related Activities [Abstract]

Restructuring

Note 20. Restructuring

On November 7, 2019, the Company announced a corporate restructuring to better align Cambium’s cost structure with current economic conditions and position the Company to achieve long-term targets and operating growth. The restructuring only affected personnel, including contract employees, and was completed in 2019. The Company incurred restructuring charges of approximately $0.7 million, of which $0.1 million was included in Accrued liabilities at December 31, 2019 in the condensed consolidated balance sheets. The $0.1 million was paid in the first quarter of 2020.

On February 10, 2020, the Company announced it was taking additional steps in connection with the abovementioned restructuring. The additional restructuring also only affects personnel, including contract employees, and is expected to be complete by the end of 2020. In the nine-month period ended September 30, 2020, the Company recorded restructuring charges of approximately $1.2 million, consisting of involuntary employee termination costs, and is included in all operating expense lines in the Company’s condensed consolidated statements of operations. As of September 30, 2020, the Company paid approximately $1.2 million of this amount, leaving a restructuring liability of $3 thousand included in Accrued liabilities in the condensed consolidated balance sheets. The remaining amount is expected to be paid in the fourth quarter of 2020.

The following table reflects the restructuring liability activity for the nine-month period ended September 30, 2020 (unaudited and in thousands):

Restructuring liability at January 1, 2020	$	138
Restructuring charges		1,180
Cost paid		(1,315	)
Restructuring liability at September 30, 2020	$	3

Business and Significant Accounting Policies (Policies)	9 Months Ended
Business and Significant Accounting Policies (Policies)	Sep. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The unaudited condensed consolidated financial statements include the accounts of Cambium Networks Corporation and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated. The condensed consolidated financial statements as of September 30, 2020, and for the three-month and nine-month periods ended September 30, 2019 and 2020, and the related notes are unaudited. The unaudited condensed consolidated financial statements have been prepared on the same basis as the annual audited consolidated financial statements, and, in the opinion of management, reflect all adjustments, which comprise only normal recurring adjustments necessary to state fairly the Company’s financial position as of September 30, 2020 and results of operations for the three-month and nine-month periods ended September 30, 2019 and 2020 and cash flows for the nine-month periods ended September 30, 2019 and 2020. The condensed consolidated balance sheet as of December 31, 2019 has been derived from the audited financial statements at that date. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principals generally accepted in the United States (“U.S. GAAP”) have been condensed or omitted. The condensed consolidated financial statements contained herein should be read in conjunction with the consolidated financial statements and related notes thereto for the year ended December 31, 2019 included in the Company’s annual report on Form 10-K and filed with the SEC on March 23, 2020. The results of operations for the three-month and nine-month periods ended September 30, 2020 are not necessarily indicative of the operating results to be expected for the full year. The Company has reclassified certain prior period amounts in the condensed consolidated statement of cash flows to conform to the current period’s presentation. Specifically, within the condensed consolidated statements of cash flows, the provision for inventory excess and obsolescence has been reclassified from “Other” to “Provision for inventory excess and obsolescence”. This change in classification does not affect previously reported cash flows from operating activities in the condensed consolidated statements of cash flows.
Update to Significant Accounting Policies	Update to Significant Accounting Policies There have been no material changes to the Company’s signifiant accounting policies disclosed in the 2019 Form 10-K, Part II, Item 8.
Receivables and concentration of credit risk	Receivables and concentration of credit risk Trade accounts receivable are recorded at invoiced amounts, net of the allowance for credit losses. The Company considers the credit risk of all customers and regularly monitors credit risk exposure in its trade receivables. The Company’s standard credit terms with its customers are generally net 30 to 60 days. The Company had one customer representing more than 10% of trade receivables at December 31, 2019 and one customer at September 30, 2020. The Company had two customers representing more than 10% of revenues for the three-month period ended September 30, 2019 and two customers representing more than 10% of revenues for the three-month period ended September 30, 2020. The Company had two customers representing more than 10% of revenues for the nine-month period ended September 30, 2019 and two customers representing more than 10% of revenues for the nine-month period ended September 30, 2020. The Company establishes an allowance for credit losses to present the net amount of accounts receivable expected to be collected. The allowance is determined by using the loss-rate method, which requires an estimation of loss rates based upon historical loss experience adjusted for factors that are relevant to determining the expected collectability of accounts receivables. Some of these factors include macroeconomic conditions that correlate with historical loss experience, delinquency trends, aging behavior of receivables, and credit and liquidity indicators for individual customers.
Recently adopted accounting pronouncements and Recently issued accounting pronouncements not yet adopted	Recently adopted accounting pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Intruments, and subsequent amendments to the initial guidance: ASUs 2018-19, 2019-04, 2019-05, 2019-11, and 2020-02 (collectively, “Topic 326”). Topic 326 sets forth an expected credit loss model which requires the measurement of expected credit losses for financial instruments based on historical experience, current conditions and reasonable and supportable forecasts. This replaces the existing incurred loss model and is applicable to the measurement of credit losses on financial assets measured at amortized cost, including trade accounts receivable, and certain off-balance sheet credit exposures. The Company adopted Topic 326 on January 1, 2020 using the modified retrospective transition method for all financial assets measured at amortized costs, which is primarily trade accounts receivable. Results for reporting periods beginning after January 1, 2020 are presented under Topic 326 while prior period amounts continue to be reported in accordance with previously applicable U.S. GAAP. The adoption of Topic 326 did not have a material impact on the condensed condolidated financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles – Goodwill and Other Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs incurred in a Cloud Computing Arrangement That is a Service Contract. The amendments in this update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this update. The Company adopted this ASU effective January 1, 2020 applying the changes prospectively to all implemenation costs incurred after this date. The adoption of ASU 2018-15 did not have a material impact on the condensed consolidated financial statements as there are no large implementations planned for 2020. In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. This update provides optional expedients and exceptions for applying generally accepted accounting principles to certain contract modification and hedging relationships that reference London Inter-bank Offered Rate (LIBOR) or another reference rate that is expected to be discontinued. The guidance is effective for all entities as of March 12, 2020 through December 31, 2022, when the reference rate replacement activity is expected to be completed. The adoption of ASU 2020-04 did not have an impact on the condensed consolidated financial statements. Recently issued accounting pronouncements not yet adopted In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, as part of its Simplification Initiative to reduce the cost and complexity in accounting for income taxes. ASU 2019-12 removes certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period, and the recognition of deferred tax liabilities for outside basis differences. ASU 2019-12 also amends other aspects of the guidance to help simplify and promote consistent application of GAAP. The guidance is effective for interim and annual periods beginning after December 15, 2020, with early adoption permitted. The Company is assessing the impact of adopting this standard on its condensed consolidated financial statements.

Business Combinations (Tables)

9 Months Ended

Sep. 30, 2020

Business Combinations [Abstract]

Summary of Preliminary Allocation of Purchase Price

The following table summarizes the final allocation of the purchase price (in thousands):

Goodwill	$	1,782
Customer relationships		7,670
Unpatented technology		540
Deferred revenue		(7,460	)
Other net assets acquired		2,468
Total purchase price	$	5,000

Balance Sheet Components (Tables)

9 Months Ended

Sep. 30, 2020

Balance Sheet Related Disclosures [Abstract]

Components of Accounts Receivable, Net

The components of accounts receivable, net are as follows (in thousands):

	December 31,			September 30,
	2019			2020
				(unaudited)
Trade accounts receivable	$	58,774		$	54,322
Other receivables		434			454
Total receivables		59,208			54,776
Less: Allowance for credit losses		(580	)		(910	)
Receivables, net	$	58,628		$	53,866

Schedule of Allowance for Credit Losses Activity

The allowance for credit losses activity was as follows (in thousands):

	Year ended December 31,			Nine months ended September 30,
	2019			2020
				(unaudited)
Beginning balance	$	503		$	580
Increase, charged to expense		333			210
Recoveries		(204	)		(71	)
Provision for late fee charges		—			191
Amounts written-off		(52	)		—
Ending balance	$	580		$	910

Schedule of Inventories, Net

Inventories, net consisted of the following (in thousands):

	December 31,			September 30,
	2019			2020
				(unaudited)
Finished goods	$	42,402		$	29,046
Raw materials		4,227			5,900
Gross inventory		46,629			34,946
Less: Excess and obsolete provision		(4,959	)		(5,892	)
Inventories, net	$	41,670		$	29,054

Schedule of Inventory Excess and Obsolete Provision

The following table reflects the activity in the Company’s inventory excess and obsolete provision (in thousands):

	Year ended December 31,			Nine months ended September 30,
	2019			2020
				(unaudited)
Beginning balance	$	3,950		$	4,959
Inventory written off		(149	)		(1,537	)
Increase in excess and obsolete provision		1,158			2,470
Ending balance	$	4,959		$	5,892

Schedule of Accrued Liabilities

Accrued liabilities consisted of the following (in thousands):

	December 31,		September 30,
	2019		2020
			(unaudited)
Accrued goods and services	$	8,364	$	8,436
Accrued inventory purchases		3,094		4,261
Accrued customer rebates		3,569		7,064
Other		7		10
Accrued liabilities	$	15,034	$	19,771

Schedule of Change to Accrued Warranty

Provisions for warranty claims are primarily related to our hardware products and are recorded at the time products are sold. The change to accrued warranty was as follows (in thousands):

	Year ended December 31,		Nine months ended September 30,
	2019		2020
			(unaudited)
Beginning balance	$	488	$	706
Warranties assumed due to acquisition		180		1,174
Fulfillment of assumed acquisition warranty		—		(387	)
Provision increase, net		38		282
Ending balance	$	706	$	1,775

Property and Equipment (Tables)

9 Months Ended

Sep. 30, 2020

Property Plant And Equipment [Abstract]

Schedule of Property and Equipment, Net

Property and equipment, net consisted of the following (in thousands):

		December 31,			September 30,
	Useful Life	2019			2020
					(unaudited)
Equipment and tooling	3 to 5 years	$	22,150		$	23,729
Computer equipment	3 to 5 years		2,888			3,039
Furniture and fixtures	10 years		749			742
Leasehold improvements	2 to 3 years		—			282
Total cost			25,787			27,792
Less: Accumulated depreciation			(17,473	)		(20,165	)
Property and equipment, net		$	8,314		$	7,627

Software (Tables)

9 Months Ended

Sep. 30, 2020

Schedule of Carrying Amount and Amortization of Software and Intangible Assets

The useful life, gross carrying value, accumulated amortization, and net balance for each major class of definite-lived intangible assets at each balance sheet date were as follows (in thousands):

		December 31, 2019							September 30, 2020
	Useful Life	Gross carrying amount		Accumulated amortization			Net balance		Gross carrying amount		Accumulated amortization			Net balance
									(unaudited)		(unaudited)			(unaudited)
Unpatented technology	3 - 7 years	$	14,660	$	(14,195	)	$	465	$	14,660	$	(14,330	)	$	330
Customer relationships	5 - 18 years		19,300		(5,631	)		13,669		19,300		(6,754	)		12,546
Patents	7 years		11,300		(11,300	)		—		11,300		(11,300	)		—
Trademarks	10 years		5,270		(4,304	)		966		5,270		(4,700	)		570
Total		$	50,530	$	(35,430	)	$	15,100	$	50,530	$	(37,084	)	$	13,446

Schedule of Estimated Amortization Expense of Capitalized Software and Intangible Assets

Based on capitalized intangible assets as of September 30, 2020, estimated amortization expense amounts in future fiscal years are as follows (unaudited and in thousands):

Year ending December 31,	Amortization
2020 (October - December)	$	552
2021		2,118
2022		1,603
2023		1,498
2024		1,498
Thereafter		6,177
Total amortization	$	13,446

Capitalized Software Assets

Schedule of Carrying Amount and Amortization of Software and Intangible Assets

Software consisted of the following (in thousands):

		December 31, 2019							September 30, 2020
	Useful Life	Gross carrying amount		Accumulated amortization			Net balance		Gross carrying amount		Accumulated amortization			Net balance
									(unaudited)		(unaudited)			(unaudited)
Acquired and Software for internal use	3 to 7 years	$	15,870	$	(13,471	)	$	2,399	$	15,678	$	(14,032	)	$	1,646
Software marketed for external sale	3 years		1,805		(809	)		996		2,675		(1,276	)		1,399
Total		$	17,675	$	(14,280	)	$	3,395	$	18,353	$	(15,308	)	$	3,045

Schedule of Estimated Amortization Expense of Capitalized Software and Intangible Assets

Based on capitalized software assets at September 30, 2020, estimated amortization expense in future fiscal years is as follows (unaudited and in thousands):

Year ending December 31,	Acquired and internal use software		Software marketed for external use		Total
2020 (October - December)	$	180	$	184	$	364
2021		683		555		1,238
2022		411		395		806
2023		162		234		396
2024		68		31		99
Thereafter		142		—		142
Total amortization	$	1,646	$	1,399	$	3,045

Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Change in Carrying Amount of Goodwill

The change in the carrying amount of goodwill for the year ended and nine-month period ended was as follows (in thousands):

	December 31,		September 30,
	2019		2020
			(unaudited)
Beginning balance	$	8,060	$	8,552
Additions attributable to acquisition		492		—
Acquisition adjustments		—		1,290
Ending balance	$	8,552	$	9,842

Schedule of Carrying Amount and Amortization of Software and Intangible Assets

The useful life, gross carrying value, accumulated amortization, and net balance for each major class of definite-lived intangible assets at each balance sheet date were as follows (in thousands):

		December 31, 2019							September 30, 2020
	Useful Life	Gross carrying amount		Accumulated amortization			Net balance		Gross carrying amount		Accumulated amortization			Net balance
									(unaudited)		(unaudited)			(unaudited)
Unpatented technology	3 - 7 years	$	14,660	$	(14,195	)	$	465	$	14,660	$	(14,330	)	$	330
Customer relationships	5 - 18 years		19,300		(5,631	)		13,669		19,300		(6,754	)		12,546
Patents	7 years		11,300		(11,300	)		—		11,300		(11,300	)		—
Trademarks	10 years		5,270		(4,304	)		966		5,270		(4,700	)		570
Total		$	50,530	$	(35,430	)	$	15,100	$	50,530	$	(37,084	)	$	13,446

Schedule of Estimated Amortization Expense of Capitalized Software and Intangible Assets

Based on capitalized intangible assets as of September 30, 2020, estimated amortization expense amounts in future fiscal years are as follows (unaudited and in thousands):

Year ending December 31,	Amortization
2020 (October - December)	$	552
2021		2,118
2022		1,603
2023		1,498
2024		1,498
Thereafter		6,177
Total amortization	$	13,446

Debt (Tables)

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Schedule of Current and Noncurrent Portions of External Debt Facilities

The following table reflects the current and noncurrent portions of the external debt facilities at December 31, 2019 and September 30, 2020 (in thousands):

	December 31,			September 30,
	2019			2020
				(unaudited)
Term loan facility	$	65,250		$	57,750
Less debt issuance costs		(1,638	)		(1,228	)
Total debt		63,612			56,522
Less current portion of term facility		(10,000	)		(10,000	)
Current portion of debt issuance costs		546			546
Total long-term external debt, net	$	54,158		$	47,068

Schedule of Maturities on External Debt Outstanding

Maturities on the external debt outstanding at September 30, 2020 is as follows (unaudited and in thousands):

Year ending December 31,
2020 (October - December)	$	2,500
2021		10,000
2022		45,250
Total	$	57,750

Schedule of Current Debt Compliance with Covenant

The Company’s current debt covenant requirements for the next four quarters reflect the following limits, based on the time period noted, for compliance with the covenant.:

		Quarter ending
Covenant	Criteria		December 31, 2020	March 31, 2021	June 30, 2021	September 30, 2021
Monthly minimum adjusted quick ratio	Min ratio	Non quarter-end months 1.00:1.00 Quarter-end months 1.15:1.00
Quarterly consolidated fixed charge coverage ratio	Min ratio		1.25:1.00	1.25:1.00	1.25:1.00	1.25:1.00
Quarterly consolidated fixed charge coverage ratio	Time period	Trailing twelve-month
Quarterly consolidated leverage ratio	Max ratio		2.50:1.00	2.25:1.00	2.25:1.00	2.00:1.00
Quarterly consolidated leverage ratio	Time period	Trailing twelve-month

Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Changes in Number of Shares Available for Grant

The following table summarizes changes in the number of shares available for grant under the Company’s equity incentive plans during the nine-month period ended September 30, 2020 (unaudited):

	Number of shares
Available for grant at December 31, 2019		426,022
Added to 2019 Share Incentive Plan		1,283,649
RSUs granted		(506,500	)
Options granted		(560,000	)
Shares withheld in settlement of taxes		10,341
Forfeitures		160,250
Available for grant at September 30, 2020		813,762

Schedule of Total Share Based Compensation Expense

The following table shows total share-based compensation expense for the three-month and nine-month periods ended September 30, 2019 and 2020 (unaudited and in thousands):

	Three Months Ended September 30				Nine Months Ended September 30,
	2019		2020		2019		2020
Cost of revenues	$	14	$	16	$	196	$	51
Research and development		199		396		5,062		1,186
Sales and marketing		374		251		3,981		726
General and administrative		241		291		7,667		742
Total share-based compensation expense	$	828	$	954	$	16,906	$	2,705

Summary of Stock Option Activity

The following is a summary of option activity for the Company’s share incentive plans for the nine-month period ended September 30, 2020 (unaudited):

	Options			Weighted average exercise price		Weighted Average remaining contractual term (years)		Aggregate intrinsic value
Outstanding at December 31, 2019		2,920,500		$	10.40		9.6	$	1,932,000
Options granted		560,000		$	15.65		—	$	—
Options exercised		(13,594	)	$	12.00		—	$	—
Options forfeited		(160,250	)	$	10.76		—	$	—
Outstanding at September 30, 2020		3,306,656		$	11.26		9.1	$	18,548,215
Options exercisable at September 30, 2020		696,461		$	11.97		8.7	$	3,416,065
Options vested and expected to vest at September 30, 2020		3,119,588		$	11.24		9.1	$	17,576,131

Schedule of Estimated Fair Value of Weighted Average Assumptions

	For the nine months ended September 30,
	2019			2020
Expected dividend yield		—			—
Risk-free interest rate		1.82	%		0.39	%
Weighted-average expected volatility		40.8	%		50.0	%
Expected term (in years)		6.0			6.5
Weighted average grant-date fair value per share of options granted	$	5.00		$	7.56

Summary of Restricted Shares Activity

The following is a summary of restricted shares activity for the Company’s share incentive plans for the nine-month period ended September 30, 2020 (unaudited):

	Units			Weighted average grant date fair value
RSU and RSA balance at December 31, 2019		257,119		$	12.00
RSUs and RSAs granted		506,500		$	4.56
RSUs and RSAs vested		(18,055	)	$	12.00
RSUs and RSAs forfeited		(5,078	)	$	12.00
RSU and RSA balance at September 30, 2020		740,486		$	6.91
RSUs and RSAs expected to vest at September 30, 2020		740,486		$	6.91

Share Capital - Shares (Tables)

9 Months Ended

Sep. 30, 2020

Stockholders Equity Note [Abstract]

Shares (Share Capital Activity)

The following table reflects the share capital activity (unaudited):

	Number of shares			Value (in thousands)
Balance at December 31, 2019		25,672,983		$	3
Shares withheld for net settlement of shares issued		(10,341	)		—
Share options exercised		13,594			—
Issuance of vested shares		24,505			—
Balance at September 30, 2020		25,700,741		$	3

Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Net Earnings (Loss) Per Share

The following table sets forth the computation of basic and diluted net earnings (loss) per share (unaudited and in thousands, except for share and per share data):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2020		2019			2020
Numerator:
Net income (loss)	$	1,960	$	5,595	$	(16,552	)	$	8,069
Denominator:
Basic weighted average shares outstanding		25,634,417		25,691,357		17,743,703			25,683,969
Dilutive effect of share option awards		—		281,244		—			—
Dilutive effect of restricted share units and restricted share awards		—		374,072		—			183,195
Diluted weighted average shares outstanding		25,634,417		26,346,673		17,743,703			25,867,164
Net earnings (loss) per share, basic	$	0.08	$	0.22	$	(0.93	)	$	0.31
Net earnings (loss) per share, diluted	$	0.08	$	0.21	$	(0.93	)	$	0.31

Schedule of Anti-dilutive Securities Excluded from Computation of Diluted Net Loss Per Share

	Three Months Ended September 30,					Nine Months Ended September 30,
	2019		2020		2019			2020
Share options		—		1,966			2,076		2,821
Restricted shares (RSUs and RSAs)		—		—			268		240
Total		—		1,966			2,344		3,061

Segment Information and Revenues by Geography (Tables)

9 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Schedule of Revenues by Product Category

Revenues by product were as follows (unaudited and in thousands, except percentages):

	Three Months Ended September 30,								Nine Months Ended September 30,
	2019				2020				2019				2020
Point-to-Multi-Point	$	38,856	59	%	$	43,342	59	%	$	122,913	61	%	$	118,773	61	%
Point-to-Point		15,976	24	%		17,967	25	%		53,440	26	%		43,679	22	%
Wi-Fi		10,141	16	%		9,949	14	%		24,157	12	%		29,070	15	%
Other		730	1	%		1,713	2	%		2,456	1	%		4,132	2	%
Total Revenues	$	65,703	100	%	$	72,971	100	%	$	202,966	100	%	$	195,654	100	%

Schedule of Revenues by Geography

Revenues by geography were as follows (unaudited and in thousands, except percentages):

	Three Months Ended September 30,								Nine Months Ended September 30,
	2019				2020				2019				2020
North America	$	29,032	44	%	$	38,656	53	%	$	93,452	46	%	$	102,145	52	%
Europe, Middle East and Africa		21,749	33	%		20,250	28	%		66,713	33	%		59,418	30	%
Caribbean and Latin America		8,008	12	%		9,138	12	%		23,527	12	%		19,021	10	%
Asia Pacific		6,914	11	%		4,927	7	%		19,274	9	%		15,070	8	%
Total Revenues	$	65,703	100	%	$	72,971	100	%	$	202,966	100	%	$	195,654	100	%

Revenues from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2020

Revenue From Contract With Customer [Abstract]

Summary of Contract Balances

The following table summarizes contract balances as of December 31, 2019 and September 30, 2020 (in thousands):

	December 31, 2019		September 30, 2020
			(unaudited)
Trade accounts receivable, net of allowance for doubtful accounts	$	58,254	$	53,472
Deferred revenue - current		7,430		6,731
Deferred revenue - noncurrent		4,852		4,278
Refund liability	$	2,223	$	2,119

Leases (Tables)

9 Months Ended

Sep. 30, 2020

Leases [Abstract]

Components of Lease Expense

The components of lease expense were as follows and are included in general and administrative expense (unaudited and in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2020		2019		2020
Operating lease cost	$	596	$	643	$	1,773	$	1,935
Short-term lease cost		47		96		137		245
Variable lease costs		105		67		304		282
Total lease expense	$	748	$	806	$	2,214	$	2,462

Supplemental Balance Sheet Information

Supplemental balance sheet information related to leases were as follows (in thousands, except lease term and discount rate):

	Balance Sheet Caption	December 31, 2019			September 30, 2020
					(unaudited)
Operating leases:
Operating lease assets	Operating lease assets	$	6,872		$	5,494
Current lease liabilities	Other current liabilities	$	2,125		$	2,284
Noncurrent lease liabilities	Noncurrent operating lease liabilities	$	5,335		$	3,689
Weighted average remaining lease term (years):
Operating leases			3.98			3.44
Weighted average discount rate:
Operating leases			8.50	%		8.36	%

Supplemental Cash Flow Information

Supplemental cash flow information related to leases were as follows (unaudited and in thousands):

	Nine Months Ended September 30,
	2019		2020
Supplemental cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$	1,910	$	1,937

Remaining Maturities on Lease Liabilities

Remaining maturities on lease liabilities as of September 30, 2020 is as follows (unaudited and in thousands):

	Operating leases
2020 (October - December)	$	686
2021		2,515
2022		1,400
2023		1,305
2024		548
Thereafter		464
Total lease payments		6,918
Less: interest		945
Present value of lease liabilities	$	5,973

Restructuring (Tables)

9 Months Ended

Sep. 30, 2020

Restructuring And Related Activities [Abstract]

Schedule of Restructuring Liability Activity

The following table reflects the restructuring liability activity for the nine-month period ended September 30, 2020 (unaudited and in thousands):

Restructuring liability at January 1, 2020	$	138
Restructuring charges		1,180
Cost paid		(1,315	)
Restructuring liability at September 30, 2020	$	3

Business and Significant Accounting Policies - Additional Information (Details) - Customer	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
ASU 2016-13
Business And Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true		true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2020		Jan. 01, 2020
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true		true
ASU 2018-15
Business And Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true		true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2020		Jan. 01, 2020
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true		true
ASU 2020-04
Business And Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true		true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Mar. 12, 2020		Mar. 12, 2020
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true		true
Accounts Receivables \| Customer Concentration Risk
Business And Significant Accounting Policies [Line Items]
Concentration risk, percentage					10.00%
Number of customers			1		1
Revenues \| Customer Concentration Risk
Business And Significant Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%	10.00%
Number of customers	2	2	2	2
Minimum
Business And Significant Accounting Policies [Line Items]
Collection period for trade accounts receivable			30 days
Maximum
Business And Significant Accounting Policies [Line Items]
Collection period for trade accounts receivable			60 days

Business Combinations - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Aug. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Business Acquisition [Line Items]
Cash paid upon closing of acquisition		$ 334	$ 2,000
Xirrus Wi-Fi Business
Business Acquisition [Line Items]
Cash paid upon closing of acquisition	$ 2,000
Additional contingent consideration on attaining booking targets related to product sales	$ 3,000

Business Combinations - Summary of Preliminary Allocation of Purchase Price (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 9,842	$ 8,552	$ 8,060
Xirrus Wi-Fi Business
Business Acquisition [Line Items]
Goodwill	1,782
Deferred revenue	(7,460)
Other net assets acquired	2,468
Total purchase price	5,000
Xirrus Wi-Fi Business \| Customer Relationships
Business Acquisition [Line Items]
Intangible assets	7,670
Xirrus Wi-Fi Business \| Unpatented Technology
Business Acquisition [Line Items]
Intangible assets	$ 540

Fair Value - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended	12 Months Ended
	Feb. 29, 2020	Nov. 30, 2019	Sep. 30, 2019	Dec. 31, 2019	Sep. 30, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value credit agreement				$ 65.3	$ 57.8
Payment for contingent consideration	$ 0.3	$ 2.7
Contingent Consideration
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Level 3 liability for contingent consideration			$ 3.0	$ 3.0

Balance Sheet Components - Components of Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Notes And Loans Receivable [Line Items]
Total receivables	$ 54,776	$ 59,208
Less: Allowance for credit losses	(910)	(580)	$ (503)
Receivables, net	53,866	58,628
Trade Accounts Receivable
Accounts Notes And Loans Receivable [Line Items]
Total receivables	54,322	58,774
Other Receivables
Accounts Notes And Loans Receivable [Line Items]
Total receivables	$ 454	$ 434

Balance Sheet Components - Schedule of Allowance for Credit Losses Activity (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Accounts Receivable Net Current [Abstract]
Beginning balance	$ 580	$ 503
Increase, charged to expense	210	333
Recoveries	(71)	(204)
Provision for late fee charges	191
Amounts written-off		(52)
Ending balance	$ 910	$ 580

Balance Sheet Components - Schedule of Inventories, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Inventory Net [Abstract]
Finished goods	$ 29,046	$ 42,402
Raw materials	5,900	4,227
Gross inventory	34,946	46,629
Less: Excess and obsolete provision	(5,892)	(4,959)	$ (3,950)
Inventories, net	$ 29,054	$ 41,670

Balance Sheet Components - Schedule of Inventory Excess and Obsolete Provision (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Inventory Net [Abstract]
Beginning balance	$ 4,959	$ 3,950
Inventory written off	(1,537)	(149)
Increase in excess and obsolete provision	2,470	1,158
Ending balance	$ 5,892	$ 4,959

Balance Sheet Components - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accrued Liabilities Current [Abstract]
Accrued goods and services	$ 8,436	$ 8,364
Accrued inventory purchases	4,261	3,094
Accrued customer rebates	7,064	3,569
Other	10	7
Accrued liabilities	$ 19,771	$ 15,034

Balance Sheet Components - Schedule of Change to Accrued Warranty (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Standard Product Warranty Disclosure [Abstract]
Beginning balance	$ 706	$ 488
Warranties assumed due to acquisition	1,174	180
Fulfillment of assumed acquisition warranty	(387)
Provision increase, net	282	38
Ending balance	$ 1,775	$ 706

Balance Sheet Components - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Product Warranty Liability [Line Items]
Accrued warranty	$ 1,775	$ 706	$ 488
Other Current Liabilities
Product Warranty Liability [Line Items]
Accrued warranty	1,100	$ 700
Other Noncurrent Liabilities
Product Warranty Liability [Line Items]
Accrued warranty	$ 700

Property and Equipment - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Total cost	$ 27,792	$ 25,787
Less: Accumulated depreciation	(20,165)	(17,473)
Property and equipment, net	7,627	8,314
Equipment and Tooling
Property Plant And Equipment [Line Items]
Total cost	$ 23,729	22,150
Equipment and Tooling \| Minimum
Property Plant And Equipment [Line Items]
Useful Life	3 years
Equipment and Tooling \| Maximum
Property Plant And Equipment [Line Items]
Useful Life	5 years
Computer Equipment
Property Plant And Equipment [Line Items]
Total cost	$ 3,039	2,888
Computer Equipment \| Minimum
Property Plant And Equipment [Line Items]
Useful Life	3 years
Computer Equipment \| Maximum
Property Plant And Equipment [Line Items]
Useful Life	5 years
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Useful Life	10 years
Total cost	$ 742	$ 749
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total cost	$ 282
Leasehold Improvements \| Minimum
Property Plant And Equipment [Line Items]
Useful Life	2 years
Leasehold Improvements \| Maximum
Property Plant And Equipment [Line Items]
Useful Life	3 years

Property and Equipment - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Property Plant And Equipment [Abstract]
Depreciation expense	$ 900	$ 900	$ 2,817	$ 2,633

Software - Schedule of Software (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 18,353	$ 17,675
Accumulated amortization	(15,308)	(14,280)
Net balance	3,045	3,395
Acquired and Software for Internal Use
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	15,678	15,870
Accumulated amortization	(14,032)	(13,471)
Net balance	$ 1,646	2,399
Acquired and Software for Internal Use \| Minimum
Finite Lived Intangible Assets [Line Items]
Useful life	3 years
Acquired and Software for Internal Use \| Maximum
Finite Lived Intangible Assets [Line Items]
Useful life	7 years
Software Marketed for External Sale
Finite Lived Intangible Assets [Line Items]
Useful life	3 years
Gross carrying amount	$ 2,675	1,805
Accumulated amortization	(1,276)	(809)
Net balance	$ 1,399	$ 996

Software - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Acquired and Software for Internal Use
Finite Lived Intangible Assets [Line Items]
Amortization expense	$ 0.2	$ 0.1	$ 0.6	$ 0.3
Acquired and Software for Internal Use \| Minimum
Finite Lived Intangible Assets [Line Items]
Useful life			3 years
Acquired and Software for Internal Use \| Maximum
Finite Lived Intangible Assets [Line Items]
Useful life			7 years
Software Marketed for External Sale
Finite Lived Intangible Assets [Line Items]
Useful life			3 years
Amortization expense	$ 0.2	$ 0.2	$ 0.5	$ 0.4

Software - Schedule of Estimated Amortization Expense of Capitalized Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
2020 (October - December)	$ 552
2021	2,118
2022	1,603
2023	1,498
2024	1,498
Thereafter	6,177
Total amortization	13,446	$ 15,100
Capitalized Software Assets
Finite Lived Intangible Assets [Line Items]
2020 (October - December)	364
2021	1,238
2022	806
2023	396
2024	99
Thereafter	142
Total amortization	3,045
Capitalized Software Assets \| Acquired and Internal Use Software
Finite Lived Intangible Assets [Line Items]
2020 (October - December)	180
2021	683
2022	411
2023	162
2024	68
Thereafter	142
Total amortization	1,646
Capitalized Software Assets \| Software Marketed for External Use
Finite Lived Intangible Assets [Line Items]
2020 (October - December)	184
2021	555
2022	395
2023	234
2024	31
Total amortization	$ 1,399

Goodwill and Intangible Assets - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) Segment Subsidiary Unit	Sep. 30, 2019 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Number of operating segment \| Segment			1
Number of reportable segments \| Segment			1
Number of operating subsidiaries \| Subsidiary			2
Number of reporting unit \| Unit			1
Impairment of goodwill \| $			$ 0
Amortization expense \| $	$ 600,000	$ 400,000	$ 1,700,000	$ 1,000,000

Goodwill and Intangible Assets - Schedule of Change in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning balance	$ 8,552	$ 8,060
Additions attributable to acquisition		492
Acquisition adjustments	1,290
Ending balance	$ 9,842	$ 8,552

Goodwill and Intangible Assets - Schedule of Carrying Amount and Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 50,530	$ 50,530
Accumulated amortization	(37,084)	(35,430)
Total amortization	13,446	15,100
Unpatented Technology
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	14,660	14,660
Accumulated amortization	(14,330)	(14,195)
Total amortization	$ 330	465
Unpatented Technology \| Minimum
Finite Lived Intangible Assets [Line Items]
Useful life	3 years
Unpatented Technology \| Maximum
Finite Lived Intangible Assets [Line Items]
Useful life	7 years
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 19,300	19,300
Accumulated amortization	(6,754)	(5,631)
Total amortization	$ 12,546	13,669
Customer Relationships \| Minimum
Finite Lived Intangible Assets [Line Items]
Useful life	5 years
Customer Relationships \| Maximum
Finite Lived Intangible Assets [Line Items]
Useful life	18 years
Patents
Finite Lived Intangible Assets [Line Items]
Useful life	7 years
Gross carrying amount	$ 11,300	11,300
Accumulated amortization	$ (11,300)	(11,300)
Trademarks
Finite Lived Intangible Assets [Line Items]
Useful life	10 years
Gross carrying amount	$ 5,270	5,270
Accumulated amortization	(4,700)	(4,304)
Total amortization	$ 570	$ 966

Goodwill and Intangible Assets - Schedule of Estimated Amortization Expense of Capitalized Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Finite Lived Intangible Assets Net [Abstract]
2020 (October - December)	$ 552
2021	2,118
2022	1,603
2023	1,498
2024	1,498
Thereafter	6,177
Total amortization	$ 13,446	$ 15,100

Debt - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
	Jun. 28, 2019	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt outstanding				$ 57,750		$ 57,750
Net interest expense				1,200	$ 2,100	4,100	$ 6,700
Term Loan Facility
Debt Instrument [Line Items]
Debt outstanding				$ 57,750		$ 57,750			$ 65,250
Debt instrument interest rate				6.00%		6.00%		6.00%	6.85%
Term Loan Facility \| Base Rate
Debt Instrument [Line Items]
Debt instrument base rate				4.75%
Term Loan Facility \| Base Rate \| Scenario Forecast
Debt Instrument [Line Items]
Debt instrument base rate		4.00%	4.25%
Term Loan Facility \| Third Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Debt outstanding	$ 70,000
Debt instrument, maturity date	Dec. 22, 2022
Revolving Credit Facility
Debt Instrument [Line Items]
Debt outstanding				$ 0		$ 0
Debt Instrument amount available under credit facility				$ 10,000		$ 10,000
Revolving Credit Facility \| Third Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Debt outstanding	$ 10,000
Debt instrument, maturity date	Dec. 22, 2022

Debt - Schedule of Current and Noncurrent Portions of External Debt Facilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term debt, Gross	$ 57,750
Less debt issuance costs	(1,228)	$ (1,638)
Total debt	56,522	63,612
Less current portion of term facility	(10,000)	(10,000)
Current portion of debt issuance costs	546	546
Total long-term external debt, net	47,068	54,158
Term Loan Facility
Debt Instrument [Line Items]
Long-term debt, Gross	$ 57,750	$ 65,250

Debt - Schedule of Maturities on External Debt Outstanding (Details) $ in Thousands	Sep. 30, 2020 USD ($)
Maturities Of Long Term Debt [Abstract]
2020 (October - December)	$ 2,500
2021	10,000
2022	45,250
Total	$ 57,750

Debt - Schedule of Current Debt Compliance with Covenant (Details)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Monthly minimum adjusted quick ratio, Non quarter-end months	100.00%
Monthly minimum adjusted quick ratio, Quarter-end months	115.00%
Consolidated fixed charge coverage ratio fourth quarter	125.00%
Consolidated fixed charge coverage ratio first quarter of next year	125.00%
Consolidated fixed charge coverage ratio second quarter of next year	125.00%
Consolidated fixed charge coverage ratio third quarter of next year	125.00%
Consolidated fixed charge coverage ratio description, twelve month	Trailing twelve-month
Consolidated leverage coverage ratio fourth quarter	250.00%
Consolidated leverage coverage ratio first quarter of next year	225.00%
Consolidated leverage coverage ratio second quarter of next year	225.00%
Consolidated leverage coverage ratio third quarter of next year	200.00%
Consolidated leverage ratio description, twelve month	Trailing twelve-month

Employee Benefit Plans - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
U.S. Pan
Defined Benefit Plan Disclosure [Line Items]
Percentage of employer contribution to employee contribution plan dollar for dollar match	4.00%
Defined contribution plan, employer discretionary contribution amount	$ 0.3	$ 0.2	$ 0.8	$ 0.7
UK Plan
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, employee matching contribution, percent of match			3.00%
Defined contribution plan, employer matching contribution, percent of match			5.00%
Defined contribution plan, employer matching contribution, percent of employees' gross pay			1.00%
Defined contribution plan, maximum annual contributions per employee, percent			7.00%
Defined contribution plan, total contribution by the company	$ 0.1	$ 0.1	$ 0.3	$ 0.3

Other Expense - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net Other Expense
Other Non Operating Income and Expense [Line Items]
Foreign exchange (gains) and losses	$ 0.3	$ 0.1	$ 0.1	$ 0.3

Share-Based Compensation - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended			9 Months Ended
	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 24, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted					506,500
Share-based compensation tax benefits		$ 200,000	$ 100,000		$ 500,000	$ 500,000
Share-based compensation					2,705,000	$ 16,906,000
Pretax unrecognized compensation expense					$ 13,400,000
Forfeiture rate utilized for estimating forfeitures of options and restricted share units granted.					5.00%
Share options contractual term					10 years
Aggregate intrinsic value of options exercisable		3,416,065			$ 3,416,065
Share options exercised, shares					13,594
Unrecognized pre-tax share based compensation expense related to unvested share option awards		11,200,000			$ 11,200,000
Shares vested					18,055
Unrecognized pre-tax compensation expense related to unvested share awards		$ 2,200,000			$ 2,200,000
Employee Share Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized							256,730
Number of outstanding shares added annually	275,000
Percentage of outstanding shares	1.00%
Total number of shares available under ESPP	550,000
Percentage of purchase price shares on first trading day of each offering period or on the purchase date	85.00%
Recapitalization Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation				$ 15,400,000
2019 Share Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized		1,283,649			1,283,649		1,283,649
Shares granted					506,500
Percentage of outstanding shares	5.00%
2019 Share Incentive Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of outstanding shares added annually	1,320,000
2019 Share Incentive Plan \| IPO
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized	3,400,000			3,400,000
2019 Share Incentive Plan \| RSAs and RSUs \| IPO
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted	240,037
2019 Share Incentive Plan \| Recapitalization Awards \| IPO
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share price	$ 12.00			$ 12.00
2019 Share Incentive Plan \| Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted					506,500
Shares vested					18,055
Shares to pay emloyees' portion of minimum payroll withholding taxes					3,889

Share-Based Compensation - Summary of Changes in Number of Shares Available for Grant (Details) - shares	9 Months Ended
	Sep. 30, 2020	Mar. 24, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSUs granted	(506,500)
Options granted	(560,000)
Forfeitures	160,250
2019 Share Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Available for grant, beginning balance	426,022
Number of shares authorized	1,283,649	1,283,649
RSUs granted	(506,500)
Options granted	(560,000)
Shares withheld in settlement of taxes	10,341
Forfeitures	160,250
Available for grant, ending balance	813,762

Share-Based Compensation - Schedule of Total Share Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	$ 954	$ 828	$ 2,705	$ 16,906
Cost of Revenues
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	16	14	51	196
Research and Development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	396	199	1,186	5,062
Sales and Marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	251	374	726	3,981
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	$ 291	$ 241	$ 742	$ 7,667

Share-Based Compensation - Summary of Stock Option Activity (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares
Options
Options outstanding, Beginning balance \| shares	2,920,500
Options granted \| shares	560,000
Options exercised \| shares	(13,594)
Options forfeited \| shares	(160,250)
Options outstanding, Ending balance \| shares	3,306,656	2,920,500
Options exercisable \| shares	696,461
Options vested and expected to vest \| shares	3,119,588
Weighted average exercise price
Weighted average exercise price, Outstanding beginning balance \| $ / shares	$ 10.40
Weighted average exercise price, Options granted \| $ / shares	15.65
Weighted average exercise price, Options exercised \| $ / shares	12.00
Weighted average exercise price, Options forfeited \| $ / shares	10.76
Weighted average exercise price, Outstanding ending balance \| $ / shares	11.26	$ 10.40
Weighted average exercise price, Options exercisable \| $ / shares	11.97
Weighted average exercise price, Options vested and expected to vest \| $ / shares	$ 11.24
Weighted average remaining contractual term (years)
Weighted average remaining contractual term, Options outstanding	9 years 1 month 6 days	9 years 7 months 6 days
Weighted average remaining contractual term, Options exercisable	8 years 8 months 12 days
Weighted average remaining contractual term, Options vested and expected to vest	9 years 1 month 6 days
Aggregate intrinsic value, Outstanding, Beginning balance \| $	$ 18,548,215	$ 1,932,000
Aggregate intrinsic value, Options exercisable \| $	3,416,065
Aggregate intrinsic value, Options vested and expected to vest \| $	$ 17,576,131

Share-Based Compensation - Schedule of Estimated Fair Value of Weighted Average Assumptions (Details) - $ / shares	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Risk-free interest rate	0.39%	1.82%
Weighted-average expected volatility	50.00%	40.80%
Expected term (in years)	6 years 6 months	6 years
Weighted average grant-date fair value per share of options granted	$ 7.56	$ 5.00

Share-Based Compensation - Summary of Restricted Shares Activity (Details)	9 Months Ended
	Sep. 30, 2020 $ / shares shares
Number of Units
Number of Units, RSU and RSA, beginning balance \| shares	257,119
Number of Units, RSU and RSA, granted \| shares	506,500
Number of Units, RSU and RSA, vested \| shares	(18,055)
Number of Units, RSU and RSA, forfeited \| shares	(5,078)
Number of Units, RSU and RSA, ending balance \| shares	740,486
Number of Units, RSUs and RSAs, expected to vest \| shares	740,486
Weighted average grant date fair value
Weighted average grant date fair value, RSU and RSA, beginning balance \| $ / shares	$ 12.00
Weighted average grant date fair value, RSU and RSA, granted \| $ / shares	4.56
Weighted average grant date fair value, RSU and RSA, vested \| $ / shares	12.00
Weighted average grant date fair value, RSU, and RSA, forfeited \| $ / shares	12.00
Weighted average grant date fair value, RSU and RSA, ending balance \| $ / shares	6.91
Weighted average grant date fair value, RSU and RSA, expected to vest \| $ / shares	$ 6.91

Share Capital - Shares (Share Capital Activity) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Schedule Of Capitalization Equity [Line Items]
Share options exercised, shares		13,594
Share options exercised	$ 163	$ 163
Share Capital
Schedule Of Capitalization Equity [Line Items]
Beginning balance, shares	25,684,000	25,672,983
Shares withheld for net settlement of shares issued, Number of shares		(10,341)
Share options exercised, shares	14,000	13,594
Issuance of vested shares, Number of shares		24,505
Ending balance, shares	25,700,741	25,700,741
Beginning balance		$ 3
Ending balance	$ 3	$ 3

Share Capital - Shares - Additional Information (Details)	9 Months Ended
	Sep. 30, 2020 $ / shares
Stockholders Equity Note [Abstract]
Common stock dividends declared	$ 0
Common stock dividends paid	$ 0

Earnings Per Share - Computation of Basic and Diluted Net Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net income (loss)	$ 5,595	$ 1,960	$ 8,069	$ (16,552)
Denominator:
Basic weighted average shares outstanding	25,691,357	25,634,417	25,683,969	17,743,703
Dilutive effect of share option awards	281,244
Dilutive effect of restricted share units and restricted share awards	374,072		183,195
Diluted weighted average shares outstanding	26,346,673	25,634,417	25,867,164	17,743,703
Net earnings (loss) per share, basic	$ 0.22	$ 0.08	$ 0.31	$ (0.93)
Net earnings (loss) per share, diluted	$ 0.21	$ 0.08	$ 0.31	$ (0.93)

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Earnings Per Share - Schedule of Anti-dilutive Securities Excluded from Computation of Diluted Net Loss Per Share (Details) - shares shares in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Anti-dilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of diluted net loss per share	1,966	3,061	2,344
Share Options
Anti-dilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of diluted net loss per share	1,966	2,821	2,076
Restricted Shares (RSUs and RSAs)
Anti-dilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of diluted net loss per share		240	268

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
	Jul. 22, 2020	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Schedule Of Income Taxes [Line Items]
Provision for income taxes		$ 144		$ 3	$ 224	$ 9,041
Effective tax rate		2.50%		0.20%	2.70%	(120.40%)
Statutory rate			21.00%
Increase in assets due to change in tax rates on deferred tax assets	$ 900
UK
Schedule Of Income Taxes [Line Items]
Statutory rate	19.00%

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Segment Information and Revenues by Geography - Additional Information (Details)	9 Months Ended
	Sep. 30, 2020 Segment
Segment Reporting [Abstract]
Number of reporting segments	1
Number of operating segment	1

Segment Information and Revenues by Geography - Schedule of Revenues by Product Category (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Revenues	$ 72,971	$ 65,703	$ 195,654	$ 202,966
Sales Revenue, Product Line \| Sales Revenue, Product Line
Segment Reporting Information [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Point-to-Multi-Point
Segment Reporting Information [Line Items]
Revenues	$ 43,342	$ 38,856	$ 118,773	$ 122,913
Point-to-Multi-Point \| Sales Revenue, Product Line \| Sales Revenue, Product Line
Segment Reporting Information [Line Items]
Concentration risk, percentage	59.00%	59.00%	61.00%	61.00%
Point-to-Point
Segment Reporting Information [Line Items]
Revenues	$ 17,967	$ 15,976	$ 43,679	$ 53,440
Point-to-Point \| Sales Revenue, Product Line \| Sales Revenue, Product Line
Segment Reporting Information [Line Items]
Concentration risk, percentage	25.00%	24.00%	22.00%	26.00%
Wi-Fi
Segment Reporting Information [Line Items]
Revenues	$ 9,949	$ 10,141	$ 29,070	$ 24,157
Wi-Fi \| Sales Revenue, Product Line \| Sales Revenue, Product Line
Segment Reporting Information [Line Items]
Concentration risk, percentage	14.00%	16.00%	15.00%	12.00%
Other
Segment Reporting Information [Line Items]
Revenues	$ 1,713	$ 730	$ 4,132	$ 2,456
Other \| Sales Revenue, Product Line \| Sales Revenue, Product Line
Segment Reporting Information [Line Items]
Concentration risk, percentage	2.00%	1.00%	2.00%	1.00%

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

+ Details

Segment Information and Revenues by Geography - Schedule of Revenues by Geography (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Revenues	$ 72,971	$ 65,703	$ 195,654	$ 202,966
Sales Revenue, Product Line \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
North America
Segment Reporting Information [Line Items]
Revenues	$ 38,656	$ 29,032	$ 102,145	$ 93,452
North America \| Sales Revenue, Product Line \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	53.00%	44.00%	52.00%	46.00%
Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Revenues	$ 20,250	$ 21,749	$ 59,418	$ 66,713
Europe, Middle East and Africa \| Sales Revenue, Product Line \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	28.00%	33.00%	30.00%	33.00%
Caribbean and Latin America
Segment Reporting Information [Line Items]
Revenues	$ 9,138	$ 8,008	$ 19,021	$ 23,527
Caribbean and Latin America \| Sales Revenue, Product Line \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	12.00%	12.00%	10.00%	12.00%
Asia Pacific
Segment Reporting Information [Line Items]
Revenues	$ 4,927	$ 6,914	$ 15,070	$ 19,274
Asia Pacific \| Sales Revenue, Product Line \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	7.00%	11.00%	8.00%	9.00%

- Definition

+ References

+ Details

Revenues from Contracts with Customers - Summary of Contract Balances (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Trade accounts receivable, net of allowance for doubtful accounts	$ 53,472	$ 58,254
Deferred revenues	6,731	7,430
Deferred revenues	4,278	4,852
Refund liability	$ 2,119	$ 2,223

Revenues from Contracts with Customers - Additional Information (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) Customer	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) Customer
Revenue From Contract With Customer [Line Items]
Deferred revenue	$ 11.0		$ 11.0		$ 12.3
Revenue remaining performance obligation	6.7		6.7		$ 7.4
Revenue recognized	$ 1.5	$ 0.4	$ 6.3	$ 2.1
Revenue practical expedient, incremental cost of obtaining contract [true/false]			true
Customer Concentration Risk \| Trade Accounts Receivable
Revenue From Contract With Customer [Line Items]
Number of customer \| Customer			1		1
Concentration risk, percentage			10.00%		10.00%

Revenues from Contracts with Customers - Additional Information (Details 1)	Sep. 30, 2020	Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Remaining performance obligation expected to be recognized period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-07-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Remaining performance obligation expected to be recognized period	1 year

Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 643	$ 596	$ 1,935	$ 1,773
Short-term lease cost	96	47	245	137
Variable lease costs	67	105	282	304
Total lease expense	$ 806	$ 748	$ 2,462	$ 2,214

Leases - Supplemental Balance Sheet Information related to Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Operating leases:
Operating lease assets	$ 5,494	$ 6,872
Current lease liabilities	$ 2,284	$ 2,125
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent
Noncurrent operating lease liabilities	$ 3,689	$ 5,335
Weighted average remaining lease term (years):
Operating leases	3 years 5 months 8 days	3 years 11 months 23 days
Weighted average discount rate:
Operating leases	8.36%	8.50%

Leases - Supplemental Cash Flow Information related to Leases (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Supplemental cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$ 1,937	$ 1,910

Leases - Additional Information (Details)	9 Months Ended
Leases - Additional Information (Details)	Sep. 30, 2020
Lessee operating lease option to extend	true
Minimum
Lessee operating lease term of contract	1 year
Lessee operating lease option to extend period	1 year
Maximum
Lessee operating lease term of contract	7 years
Lessee operating lease option to extend period	4 years

Leases - Remaining Maturities on Lease Liabilities (Details) $ in Thousands	Sep. 30, 2020 USD ($)
Leases [Abstract]
2020 (October - December)	$ 686
2021	2,515
2022	1,400
2023	1,305
2024	548
Thereafter	464
Total lease payments	6,918
Less: interest	945
Present value of lease liabilities	$ 5,973

Related Party Transactions - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Vector Capital Management L.P.
Related Party Transaction [Line Items]
Management and oversight fees	$ 0.0	$ 0.0	$ 0.0	$ 0.2

Restructuring - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Restructuring Cost And Reserve [Line Items]
Restructuring charges		$ 1,180	$ 700
Restructuring charges included in Accrued liabilities		3	$ 100
Payments for restructuring		$ 1,200
Initial Restructuring
Restructuring Cost And Reserve [Line Items]
Payments for restructuring	$ 100

Restructuring - Schedule of Restructuring Liability Activity (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Restructuring And Related Activities [Abstract]
Restructuring liability at January 1, 2020	$ 138
Restructuring charges	1,180	$ 700
Cost paid	(1,315)
Restructuring liability at September 30, 2020	$ 3	$ 138