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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2020	May 08, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
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		25,684,049
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	Mar. 31, 2020	Dec. 31, 2019
Current assets
Cash	$ 24,493	$ 19,346
Receivables, net of allowances	61,606	58,628
Inventories, net	32,499	41,670
Recoverable income taxes	46
Prepaid expenses	4,078	5,323
Other current assets	4,944	4,350
Total current assets	127,666	129,317
Noncurrent assets
Property and equipment, net	8,264	8,314
Software, net	3,185	3,395
Operating lease assets	6,443	6,872
Intangible assets, net	14,548	15,100
Goodwill	9,493	8,552
Deferred tax assets, net	815	929
Other noncurrent assets	417
TOTAL ASSETS	170,831	172,479
Current liabilities
Accounts payable	16,528	25,214
Accrued liabilities	15,017	15,034
Employee compensation	5,097	4,652
Current portion of long-term external debt, net	9,454	9,454
Deferred revenues	6,331	7,430
Other current liabilities	7,400	6,084
Total current liabilities	59,827	67,868
Noncurrent liabilities
Long-term external debt, net	61,795	54,158
Deferred revenues	4,337	4,852
Noncurrent operating lease liabilities	4,724	5,335
Deferred tax liabilities, net	61	337
Other noncurrent liabilities	520
Total liabilities	131,264	132,550
Shareholders' equity
Share capital; $0.0001 par value; 500,000,000 shares authorized at December 31, 2019 and March 31, 2020; 25,753,603 shares issued and 25,672,983 outstanding at December 31, 2019 and 25,768,757 shares issued and 25,680,205 outstanding at March 31, 2020	3	3
Additional paid in capital	105,584	104,773
Treasury shares, at cost, 80,620 shares at December 31, 2019 and 88,552 shares at March 31, 2020	(1,041)	(1,094)
Accumulated deficit	(64,212)	(63,374)
Accumulated other comprehensive loss	(767)	(379)
Total shareholders' equity	39,567	39,929
TOTAL LIABILITIES AND EQUITY	$ 170,831	$ 172,479

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 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	25,768,757	25,753,603
Common stock, shares, outstanding	25,680,205	25,672,983
Treasury stock, shares	88,552	80,620

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenues	$ 60,429	$ 68,112
Cost of revenues	29,797	36,322
Gross profit	30,632	31,790
Operating expenses
Research and development	11,814	10,482
Sales and marketing	10,304	10,218
General and administrative	6,446	5,130
Depreciation and amortization	1,695	1,281
Total operating expenses	30,259	27,111
Operating income	373	4,679
Interest expense, net	1,345	2,268
Other expense (income), net	(216)	134
Income (loss) before income taxes	(756)	2,277
Provision for income taxes	82	415
Net income (loss)	$ (838)	$ 1,862
Earnings (loss) per share
Basic and diluted	$ (0.03)	$ 0.14
Weighted-average number of shares outstanding to compute net income (loss) per share
Basic and diluted	25,677,179	13,600,411

Condensed Consolidated Statements of Operations (Parenthetical) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Share-based compensation included in costs and expenses	$ 811
Cost of Revenues
Share-based compensation included in costs and expenses	17
Research and Development
Share-based compensation included in costs and expenses	368
Sales and Marketing
Share-based compensation included in costs and expenses	232
General and Administrative
Share-based compensation included in costs and expenses	$ 194

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (838)	$ 1,862
Other comprehensive loss
Foreign currency translation adjustment	(388)	(2)
Comprehensive income (loss)	$ (1,226)	$ 1,860

- Definition

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

+ References

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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 Income (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)	1,862					1,862
Foreign currency translation adjustment	(2)						(2)
Ending balance at Mar. 31, 2019	(18,711)		772	$ 24,651		(43,911)	(223)
Ending balance, shares at Mar. 31, 2019		77,000
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	25,673,000
Net income (loss)	$ (838)					(838)
Share-based compensation	811		811
Issuance of vested shares, shares		15,000
Treasury shares withheld for net settlement	53				53
Treasury shares withheld for net settlement, shares		(8,000)
Foreign currency translation adjustment	(388)						(388)
Ending balance at Mar. 31, 2020	$ 39,567	$ 3	$ 105,584		$ (1,041)	$ (64,212)	$ (767)
Ending balance, shares at Mar. 31, 2020	25,680,205	25,680,000

- Definition

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

+ References + Details

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ (838)	$ 1,862
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	955	882
Amortization of software and intangible assets	890	478
Amortization of debt issuance costs	137	165
Share-based compensation	811
Deferred income taxes	(162)	310
Other	522	866
Change in assets and liabilities:
Receivables	(2,172)	(3,487)
Inventories	8,698	(2,651)
Accounts payable	(8,546)	1,830
Accrued employee compensation	547	1,391
Accrued liabilities	(585)	1,542
Accrued Sponsor interest and payables		43
Other assets and liabilities	(1,048)	24
Net cash provided by (used in) operating activities	(791)	3,255
Cash flows from investing activities:
Purchase of property and equipment	(1,053)	(1,128)
Purchase of software	(157)	(383)
Cash paid for acquisition	(334)
Net cash used in investing activities	(1,544)	(1,511)
Cash flows from financing activities:
Proceeds from issuance of revolver debt	10,000
Repayment of term loan	(2,500)	(2,375)
Taxes paid related to net share settlement of equity awards	52
Net cash (used in) provided by financing activities	7,552	(2,375)
Effect of exchange rate on cash	(70)	(9)
Net (decrease) increase in cash	5,147	(640)
Cash, beginning of period	19,346	4,441
Cash, end of period	24,493	3,801
Supplemental disclosure of cash flow information:
Income taxes paid	149	201
Interest paid	$ 1,117	$ 1,950

Business and Significant Accounting Policies

3 Months Ended

Mar. 31, 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 March 31, 2020, and for the three-month periods ended March 31, 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 March 31, 2020 and results of operations for the three-month periods ended March 31, 2019 and 2020 and cash flows for the three-month periods ended March 31, 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 period ended March 31, 2020 are not necessarily indicative of the operating results to be expected for the full year.

Update to Significant Accounting Policies

Other than the recently implemented accounting policy related to the allowances for credit losses per the Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2016-03 (see below and Note 4 to the condensed consolidated financial statements), 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 March 31, 2020. The Company had four customers representing more than 10% of revenues for the three-month period ended March 31, 2019 and two customers for the three-month period ended March 31, 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 will not have a material impact on the condensed consolidated financial statements as there are no large implementations planned for 2020.

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 comlexity 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.

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 expected to be discontinued. The guidance is effective upon issuance and generally can be applied through December 31, 2022. The Company is currently evaluating the potential impact of this ASU on its condensed consolidated financial statements.

Business Combinations

3 Months Ended

Mar. 31, 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 $3.0 million of the expected contingent consideration that was subject to attaining certain booking targets related to sales of Xirrus products, which 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 the preliminary allocation of the puchase price on estimates and assumptions that are subject to change within the purchase price allocation period, which is generally one year from the acquisition date. During the three-month period ended March 31, 2020, the Company made adjustments to the preliminary purchase price allocation for inventory and accrued warranty. The purchase accounting is not yet complete and as such the final allocation may be subject to future adjustments, including, but not limited to, inventory, intangibles, accrued warranty, deferred revenue, and certain income tax matters. The Company determined the estimated fair value of identifiable intangible assets acquired primarily using an income approach.

The following table summarizes the preliminary allocation of the purchase price as of March 31, 2020 (in thousands):

Goodwill	$	1,433
Customer relationships		7,670
Unpatented technology		540
Deferred revenue		(7,460	)
Other net assets acquired		2,817
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

3 Months Ended

Mar. 31, 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 $72.8 million as of December 31, 2019 and March 31, 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 as of February 2020. 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

3 Months Ended

Mar. 31, 2020

Balance Sheet Related Disclosures [Abstract]

Balance sheet components

Note 4. Balance sheet components

Accounts Receivable, net

The Company’s accounts receivable arise 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 ASC 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,			March 31,
	2019			2020
				(unaudited)
Trade accounts receivable	$	58,774		$	62,000
Other receivables		434			296
Total receivables		59,208			62,296
Less: Allowance for credit losses		(580	)		(690	)
Receivables, net	$	58,628		$	61,606

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

	Year ended December 31,			Three months ended March 31,
	2019			2020
				(unaudited)
Beginning balance	$	503		$	580
Increase, charged to expense		333			125
Recoveries		(204	)		(15	)
Amounts written-off		(52	)		—
Ending balance	$	580		$	690

Inventories, net

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

	December 31,			March 31,
	2019			2020
				(unaudited)
Finished goods	$	42,402		$	31,659
Raw materials		4,227			4,886
Gross inventory		46,629			36,545
Less: Excess and obsolete provision		(4,959	)		(4,046	)
Inventories, net	$	41,670		$	32,499

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

	Year ended December 31,			Three months ended March 31,
	2019			2020
				(unaudited)
Beginning balance	$	3,950		$	4,959
Inventory written off		(149	)		(1,290	)
Increase in excess and obsolete provision		1,158			377
Ending balance	$	4,959		$	4,046

Accrued liabilities

Accrued liabilities consisted of the following (in thousands):

	December 31,		March 31,
	2019		2020
			(unaudited)
Accrued goods and services	$	8,364	$	8,113
Accrued inventory purchases		3,094		2,417
Accrued customer rebates		3,569		4,479
Other		7		8
Accrued liabilities	$	15,034	$	15,017

Accrued warranty

Provisions for warranty claims are primarily related to our hardware products and are recorded at the time products are sold. As per Note 2 – Business Combinations, during the three-month period ended March 31, 2020, the Company recorded an adjustment to the amount associated with the assumed warranty provision related to the Xirrus acquisition. The change to accrued warranty was as follows (in thousands):

	Year ended December 31,		Three months ended March 31,
	2019		2020
			(unaudited)
Beginning balance	$	488	$	706
Warranties assumed due to acquisition		180		825
Fulfillment of assumed acquisition warranty		—		(164	)
Provision increase, net		38		55
Ending balance	$	706	$	1,422

At December 31, 2019, $0.7 million is included in Other current liabilities on the Company’s condensed consolidated balance sheet. At March 31, 2020, $0.9 million is included in Other current liabilities and $0.5 million is included in Other noncurrent liabilities on the Company’s condensed consolidated balance sheet.

Property and equipment

3 Months Ended

Mar. 31, 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,			March 31,
	Useful Life	2019			2020
					(unaudited)
Equipment and tooling	3 to 5 years	$	22,150		$	22,614
Computer equipment	3 to 5 years		2,888			2,892
Furniture and fixtures	10 years		749			737
Leasehold improvements	2 to 3 years		—			282
Total cost			25,787			26,525
Less: Accumulated depreciation			(17,473	)		(18,261	)
Property and equipment, net		$	8,314		$	8,264

Total depreciation expense was $0.9 million and $1.0 million for the three-month periods ended March 31, 2019 and 2020, respectively.

Software

3 Months Ended

Mar. 31, 2020

Research And Development [Abstract]

Software

Note 6. Software

Software consisted of the following (in thousands):

		December 31, 2019							March 31, 2020
	Useful Life	Gross carrying amount		Accumulated amortization			Net balance		Gross carrying amount		Accumulated amortization			Net balance
									(unaudited)
Acquired and Software for internal use	3 to 7 years	$	15,870	$	(13,471	)	$	2,399	$	15,884	$	(13,650	)	$	2,234
Software marketed for external sale	3 years		1,805		(809	)		996		1,911		(960	)		951
Total		$	17,675	$	(14,280	)	$	3,395	$	17,795	$	(14,610	)	$	3,185

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 March 31, 2019 and 2020, respectively.

Amortization expense recognized on software to be sold or marketed externally was $0.1 million and $0.2 million for the three-month periods ended March 31, 2019 and 2020, respectively, and is included in cost of revenues on the condensed consolidated statements of operations.

Based on capitalized software assets at March 31, 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 (April - December)	$	550	$	462	$	1,012
2021		698		330		1,028
2022		449		140		589
2023		209		19		228
2024		115		—		115
Thereafter		213		—		213
Total amortization	$	2,234	$	951	$	3,185

Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 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 three-month period ended was as follows (in thousands):

	December 31,		March 31,
	2019		2020
			(unaudited)
Beginning balance	$	8,060	$	8,552
Additions attributable to acquisition		492		941
Ending balance	$	8,552	$	9,493

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 assessment 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 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 tests for the quarter did not indicate the existence of impairment indicators. Based on the operating results for the three-month period ended March 31, 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 March 31, 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							March 31, 2020
	Useful Life	Gross carrying amount		Accumulated amortization			Net balance		Gross carrying amount		Accumulated amortization			Net balance
									(unaudited)
Unpatented technology	3 - 7 years	$	14,660	$	(14,195	)	$	465	$	14,660	$	(14,240	)	$	420
Customer relationships	5 - 18 years		19,300		(5,631	)		13,669		19,300		(6,006	)		13,294
Patents	7 years		11,300		(11,300	)		—		11,300		(11,300	)		—
Trademarks	10 years		5,270		(4,304	)		966		5,270		(4,436	)		834
Total		$	50,530	$	(35,430	)	$	15,100	$	50,530	$	(35,982	)	$	14,548

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 $0.3 million and $0.6 million for the three-month periods ended March 31, 2019 and 2020, respectively (unaudited).

Based on capitalized intangible assets as of March 31, 2020, estimated amortization expense amounts in future fiscal years are as follows (unaudited and in thousands):

Year ending December 31,	Amortization
2020 (April - December)	$	1,654
2021		2,118
2022		1,603
2023		1,498
2024		1,498
Thereafter		6,177
Total amortization	$	14,548

Debt

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Debt

Note 8. Debt

As of March 31, 2020, the Company had $62.8 million outstanding under its current term loan facility and $10.0 million in borrowings under its revolving credit facility (unaudited).

During the three-month period ended March 31, 2020, the Company entered into the following financing transaction:

•

In March 2020, the Company received $10.0 million after fully drawing down on its revolving credit facility as a proactive measure to increase its cash position and preserve financial flexibility in light of current uncertainty in the global markets resulting from the COVID-19 pandemic.

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

	December 31,			March 31,
	2019			2020
				(unaudited)
Term loan facility	$	65,250		$	62,750
Revolving credit facility		—			10,000
Less debt issuance costs		(1,638	)		(1,501	)
Total debt		63,612			71,249
Less current portion of term facility		(10,000	)		(10,000	)
Current portion of debt issuance costs		546			546
Total long-term external debt	$	54,158		$	61,795

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% and was reduced to 6.0% on March 31, 2020 as a result of resetting the LIBOR rate applicable to the loan. The interest rate set on the revolving credit facility drawn on March 31, 2020 was 6.0%. 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 March 31, 2020 is as follows (unaudited and in thousands):

Year ending December 31,
2020 (April - December)	$	7,500
2021		10,000
2022		55,250
Total	$	72,750

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 March 31, 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	June 30, 2020	September 30, 2020	December 31, 2020	March 31, 2020
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	2.75:1.00	2.50:1.00	2.50:1.00	2.25:1.00
Quarterly consolidated leverage ratio	Time period	Trailing twelve-month

Interest expense, including bank charges and amortization of debt issuance costs on the external debt, was $2.3 million and $1.3 million for the three-months ended March 31, 2019 and 2020, respectively (unaudited).

Employee Benefit Plans

3 Months Ended

Mar. 31, 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 $0.2 million for the three-month periods ended March 31, 2019 and 2020, respectively (unaudited).

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 March 31, 2019 and 2020, respectively (unaudited).

Other Expense (Income)

3 Months Ended

Mar. 31, 2020

Other Income And Expenses [Abstract]

Other expense (income)

Note 10. Other expense (income)

Other expense (income) was $0.1 million and $(0.2) million for the three-month periods ended March 31, 2019 and 2020, respectively, and represents foreign exchange gains and losses (unaudited).

Share Based Compensation

3 Months Ended

Mar. 31, 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 issued 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 connection with the Company’s IPO based on a price of $12.00 (“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 restricted share awards and restricted share units are granted in substitution for Class B Units in VCH, L.P. in connection with the Company’s IPO.

The following table summarizes changes in the number of shares available for grant under the Company’s equity incentive plans during the three-month period ended March 31, 2020:

	Number of shares
Available for grant at December 31, 2019		426,022
2019 Share Incentive Plan		1,283,649
RSUs granted		(470,000	)
Shares withheld in settlement of taxes		7,932
Forfeitures		155,000
Available for grant at March 31, 2020		1,402,603

Share-based compensation

The following table shows total share-based compensation expense for the three-month periods ended March 31, 2019 and 2020 (unaudited and in thousands):

	Three Months Ended March 31,
	2019		2020
			(unaudited)
Cost of revenues	$	—	$	17
Research and development		—		368
Sales and marketing		—		232
General and administrative		—		194
Total share-based compensation expense	$	—	$	811

The Company began recognizing share-based compensation expense during the three-month period ended June 30, 2019, the period in which the triggering event associated with transactions completed in connection with the Company’s initial public offering occurred.

As of March 31, 2020, the Company estimates the pre-tax unrecognized compensation expense of $12.7 million related to all unvested share-based awards, including share options, restricted share units and restricted share awards will be recognized through the fourth quarter of 2023. 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 three-month period ended March 31, 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 three-month period ended March 31, 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 forfeited		(155,000	)	$	10.72		—	$	—
Outstanding at March 31, 2020		2,765,500		$	10.38		9.4	$	—
Options exercisable at March 31, 2020		165,000		$	12.00		9.2	$	—
Options vested and expected to vest at March 31, 2020		2,578,105		$	10.42		9.4	$	—

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

At March 31, 2020, the aggregate intrinsic value of options exercisable under the Company’s share incentive plans was $0.00. The Company had 0 options exercised during the three-month period ended March 31, 2020.

At March 31, 2020, there was $8.9 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 fourth quarter of 2023.

The fair value of options granted during the three months ended March 31, 2020 were 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 are estimated using the following weighted-average assumptions (unaudited):

	Three Months Ended March 31,
	2020
Expected dividend yield		—
Risk-free interest rate		1.80	%
Weighted-average expected volatility		40.8	%
Expected term (in years)		6.1
Weighted average grant-date fair value per share of options granted	$	4.34

Restricted shares

The following is a summary of restricted shares activity for the Company’s share incentive plans for the three-month period ended March 31, 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		470,000		$	4.50
RSUs and RSAs vested		(8,704	)	$	12.00
RSUs and RSAs forfeited		(5,078	)	$	12.00
RSU and RSA balance at March 31, 2020		713,337		$	7.06
RSUs and RSAs expected to vest at March 31, 2020		713,337		$	7.06

During the three-month period ended March 31, 2020, 470,000 RSUs were granted under the Company’s 2019 Share Incentive Plan and 8,704 RSUs vested. The Company withheld 1,480 of those shares to pay the employees’ portion of the minimum payroll withholding taxes.

As of March 31, 2020, there was $3.8 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 March 31, 2020 and will 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

3 Months Ended

Mar. 31, 2020

Stockholders Equity Note [Abstract]

Share capital - shares

Note 12. Share capital - shares

The following table reflects the share capital activity:

	Number of shares			Value (in thousands)
Balance at December 31, 2019		25,672,983		$	3
Shares withheld for net settlement of shares issued		(7,932	)		—
Issuance of vested shares		15,154			—
Balance at March 31, 2020		25,680,205		$	3
As of March 31, 2020, no dividends have been declared or paid.

Earnings Per Share

3 Months Ended

Mar. 31, 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 March 31,
	2019		2020
Numerator:
Net income (loss)	$	1,862	$	(838	)
Denominator:
Weighted average shares outstanding used in computing net income (loss), basic and diluted		13,600,411		25,677,179
Net income (loss) per share, basic and diluted	$	0.14	$	(0.03	)

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 March 31,
	2019		2020
			(unaudited)
Share options		—		2,766
Restricted shares (RSUs and RSAs)		—		713
Total		—		3,479

Income Taxes

3 Months Ended

Mar. 31, 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 $0.4 million and $0.1 million for the three-month periods ended March 31, 2019 and 2020, with an effective tax rate of 18.2% and (10.8) %, respectively. The reduction of the effective tax rate from 18.2% for the three-month period ended March 31, 2019 to (10.8)% for the three-month period ended March 31, 2020 was primarily driven by an increase in losses in a foreign jurisdiction that is excluded in calculating the quarterly income tax provision and overall lower earnings resulting from lower revenues. For the three-month period ended March 31, 2020, the Company’s effective tax rate of (10.8)% was different from the statutory rate of 21.0% primarily due to expected losses in a foreign jurisdiction for which no tax benefit will be recognized.

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. While the Company is still assessing the impact of the CARES Act, it does not currently expect it to have a material impact on its consolidated financial condition or results of operations.

Commitments and Contingencies

3 Months Ended

Mar. 31, 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. Except as set forth below, there is no pending or threatened legal proceedings to which the Company is a party to, and 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 August 18, 2020 and that dispositive motions must be filed prior to December 22, 2020. The Court referred the case to a magistrate judge for a potential settlement conference, the timing of which is currently unknown as a result of the closure of courts due to the applicable regional shutdowns implemented in response to the COVID-19 pandemic. 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. The Company cannot currently estimate the possible loss or range of losses, if any, that it may experience in connection with this litigation.

Segment Information and Revenues by Geography

3 Months Ended

Mar. 31, 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 March 31,
	2019				2020
Point-to-Multi-Point	$	42,327	62	%	$	34,867	58	%
Point-to-Point		19,634	29	%		13,110	22	%
Wi-Fi		5,586	8	%		11,481	19	%
Other		565	1	%		971	1	%
Total Revenues	$	68,112	100	%	$	60,429	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 March 31,
	2019				2020
North America	$	34,364	50	%	$	31,035	51	%
Europe, Middle East and Africa		21,970	32	%		18,744	31	%
Caribbean and Latin America		7,099	10	%		5,230	9	%
Asia Pacific		4,679	8	%		5,420	9	%
Total Revenues	$	68,112	100	%	$	60,429	100	%

Revenues from contracts with customers

3 Months Ended

Mar. 31, 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 March 31, 2020 (in thousands):

	December 31, 2019		March 31, 2020
			(unaudited)
Trade accounts receivable, net of allowance for credit losses	$	58,254	$	61,370
Deferred revenue - current		7,430		6,331
Deferred revenue - noncurrent		4,852		4,337
Refund liability	$	2,223	$	3,052

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 as of March 31, 2020.

Deferred revenue consists of amounts due or received from customers in advance of the Company satisfying performance obligations under contractual arrangements and generally relates to extended warranty on hardware products. 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 March 31, 2020, deferred revenue (current and noncurrent) of $10.7 million represents the Company’s remaining performance obligations, of which $6.3 million is expected to be recognized within one year, with the remainder to be recognized thereafter(unaudited).

Revenue recognized during the three-month period ended March 31, 2020 which was previously included in deferred revenues as of December 31, 2019 was $2.7 million compared to $1.3 million of revenue recognized during the three-month period ended March 31, 2019 which was previously included in deferred revenues as of December 31, 2018 (unaudited). The increase is driven by the addition of deferred revenue related to the Xirrus acquisition (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.

Leases

3 Months Ended

Mar. 31, 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 (in thousands):

	Three Months Ended March 31, 2019		Three Months Ended March 31, 2020
	(unaudited)		(unaudited)
Operating lease cost	$	586	$	644
Short-term lease cost		59		27
Variable lease costs		61		109
Total lease expense	$	706	$	780

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

	Balance Sheet Caption	December 31, 2019			March 31, 2020
Operating leases:
Operating lease assets	Operating lease assets	$	6,872		$	6,443
Current lease liabilities	Other current liabilities	$	2,125		$	2,208
Noncurrent lease liabilities	Noncurrent operating lease liabilities	$	5,335		$	4,724
Weighted average remaining lease term (years):
Operating leases			3.98			3.75
Weighted average discount rate:
Operating leases			8.50	%		8.50	%

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

	Three months ended March 31,		Three months ended March 31,
	2019		2020
Supplemental cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$	610	$	747

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 March 31, 2020 is as follows (unaudited and in thousands):

	Operating leases
2020 (excludes the three months ended March 31, 2020)	$	2,038
2021		2,471
2022		1,349
2023		1,292
2024		537
Thereafter		448
Total lease payments		8,135
Less: interest		1,203
Present value of lease liabilities	$	6,932

As of March 31, 2020, the Company does not have any additional leases for new office facilities that have not yet commenced.

Related Party Transactions

3 Months Ended

Mar. 31, 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 March 31, 2019 and 2020, Vector Capital Management, LP, an entity related to Holdings, charged $0.1 million and $0.0 million, respectively, for management and oversight fees. In connection with the IPO in June 2019, and the payment 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

3 Months Ended

Mar. 31, 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 three months ended March 31, 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 March 31, 2020, the Company paid approximately $1.1 million of this amount, leaving a restructuring liability of $0.1 million included in Accrued liabilities in the condensed consolidated balance sheets. The remaining amount is expected to be paid in the second quarter of 2020.

The following table reflects the restructuring liability activity for the three-month period ended March 31, 2020 (unaudited and in thousands):

Restructuring liability at December 31, 2019	$	138
Restructuring charges		1,152
Cost paid		(1,150	)
Restructuring liability at March 31, 2020	$	140

Business and Significant Accounting Policies (Policies)	3 Months Ended
Business and Significant Accounting Policies (Policies)	Mar. 31, 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 March 31, 2020, and for the three-month periods ended March 31, 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 March 31, 2020 and results of operations for the three-month periods ended March 31, 2019 and 2020 and cash flows for the three-month periods ended March 31, 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 period ended March 31, 2020 are not necessarily indicative of the operating results to be expected for the full year.
Update to Significant Accounting Policies	Update to Significant Accounting Policies Other than the recently implemented accounting policy related to the allowances for credit losses per the Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2016-03 (see below and Note 4 to the condensed consolidated financial statements), 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 March 31, 2020. The Company had four customers representing more than 10% of revenues for the three-month period ended March 31, 2019 and two customers for the three-month period ended March 31, 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 will not have a material impact on the condensed consolidated financial statements as there are no large implementations planned for 2020. 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 comlexity 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. 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 expected to be discontinued. The guidance is effective upon issuance and generally can be applied through December 31, 2022. The Company is currently evaluating the potential impact of this ASU on its condensed consolidated financial statements.

Business Combinations (Tables)

3 Months Ended

Mar. 31, 2020

Business Combinations [Abstract]

Summary of Preliminary Allocation of Purchase Price

The following table summarizes the preliminary allocation of the purchase price as of March 31, 2020 (in thousands):

Goodwill	$	1,433
Customer relationships		7,670
Unpatented technology		540
Deferred revenue		(7,460	)
Other net assets acquired		2,817
Total purchase price	$	5,000

Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2020

Balance Sheet Related Disclosures [Abstract]

Components of Accounts Receivable, Net

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

	December 31,			March 31,
	2019			2020
				(unaudited)
Trade accounts receivable	$	58,774		$	62,000
Other receivables		434			296
Total receivables		59,208			62,296
Less: Allowance for credit losses		(580	)		(690	)
Receivables, net	$	58,628		$	61,606

Schedule of Allowance for Credit Losses Activity

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

	Year ended December 31,			Three months ended March 31,
	2019			2020
				(unaudited)
Beginning balance	$	503		$	580
Increase, charged to expense		333			125
Recoveries		(204	)		(15	)
Amounts written-off		(52	)		—
Ending balance	$	580		$	690

Schedule of Inventories, Net

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

	December 31,			March 31,
	2019			2020
				(unaudited)
Finished goods	$	42,402		$	31,659
Raw materials		4,227			4,886
Gross inventory		46,629			36,545
Less: Excess and obsolete provision		(4,959	)		(4,046	)
Inventories, net	$	41,670		$	32,499

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,			Three months ended March 31,
	2019			2020
				(unaudited)
Beginning balance	$	3,950		$	4,959
Inventory written off		(149	)		(1,290	)
Increase in excess and obsolete provision		1,158			377
Ending balance	$	4,959		$	4,046

Schedule of Accrued Liabilities

Accrued liabilities consisted of the following (in thousands):

	December 31,		March 31,
	2019		2020
			(unaudited)
Accrued goods and services	$	8,364	$	8,113
Accrued inventory purchases		3,094		2,417
Accrued customer rebates		3,569		4,479
Other		7		8
Accrued liabilities	$	15,034	$	15,017

Schedule of Change to Accrued Warranty

	Year ended December 31,		Three months ended March 31,
	2019		2020
			(unaudited)
Beginning balance	$	488	$	706
Warranties assumed due to acquisition		180		825
Fulfillment of assumed acquisition warranty		—		(164	)
Provision increase, net		38		55
Ending balance	$	706	$	1,422

Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2020

Property Plant And Equipment [Abstract]

Schedule of Property and Equipment, Net

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

		December 31,			March 31,
	Useful Life	2019			2020
					(unaudited)
Equipment and tooling	3 to 5 years	$	22,150		$	22,614
Computer equipment	3 to 5 years		2,888			2,892
Furniture and fixtures	10 years		749			737
Leasehold improvements	2 to 3 years		—			282
Total cost			25,787			26,525
Less: Accumulated depreciation			(17,473	)		(18,261	)
Property and equipment, net		$	8,314		$	8,264

Software (Tables)

3 Months Ended

Mar. 31, 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							March 31, 2020
	Useful Life	Gross carrying amount		Accumulated amortization			Net balance		Gross carrying amount		Accumulated amortization			Net balance
									(unaudited)
Unpatented technology	3 - 7 years	$	14,660	$	(14,195	)	$	465	$	14,660	$	(14,240	)	$	420
Customer relationships	5 - 18 years		19,300		(5,631	)		13,669		19,300		(6,006	)		13,294
Patents	7 years		11,300		(11,300	)		—		11,300		(11,300	)		—
Trademarks	10 years		5,270		(4,304	)		966		5,270		(4,436	)		834
Total		$	50,530	$	(35,430	)	$	15,100	$	50,530	$	(35,982	)	$	14,548

Schedule of Estimated Amortization Expense of Capitalized Software and Intangible Assets

Based on capitalized intangible assets as of March 31, 2020, estimated amortization expense amounts in future fiscal years are as follows (unaudited and in thousands):

Year ending December 31,	Amortization
2020 (April - December)	$	1,654
2021		2,118
2022		1,603
2023		1,498
2024		1,498
Thereafter		6,177
Total amortization	$	14,548

Capitalized Software Assets

Schedule of Carrying Amount and Amortization of Software and Intangible Assets

Software consisted of the following (in thousands):

		December 31, 2019							March 31, 2020
	Useful Life	Gross carrying amount		Accumulated amortization			Net balance		Gross carrying amount		Accumulated amortization			Net balance
									(unaudited)
Acquired and Software for internal use	3 to 7 years	$	15,870	$	(13,471	)	$	2,399	$	15,884	$	(13,650	)	$	2,234
Software marketed for external sale	3 years		1,805		(809	)		996		1,911		(960	)		951
Total		$	17,675	$	(14,280	)	$	3,395	$	17,795	$	(14,610	)	$	3,185

Schedule of Estimated Amortization Expense of Capitalized Software and Intangible Assets

Based on capitalized software assets at March 31, 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 (April - December)	$	550	$	462	$	1,012
2021		698		330		1,028
2022		449		140		589
2023		209		19		228
2024		115		—		115
Thereafter		213		—		213
Total amortization	$	2,234	$	951	$	3,185

Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 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 three-month period ended was as follows (in thousands):

	December 31,		March 31,
	2019		2020
			(unaudited)
Beginning balance	$	8,060	$	8,552
Additions attributable to acquisition		492		941
Ending balance	$	8,552	$	9,493

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							March 31, 2020
	Useful Life	Gross carrying amount		Accumulated amortization			Net balance		Gross carrying amount		Accumulated amortization			Net balance
									(unaudited)
Unpatented technology	3 - 7 years	$	14,660	$	(14,195	)	$	465	$	14,660	$	(14,240	)	$	420
Customer relationships	5 - 18 years		19,300		(5,631	)		13,669		19,300		(6,006	)		13,294
Patents	7 years		11,300		(11,300	)		—		11,300		(11,300	)		—
Trademarks	10 years		5,270		(4,304	)		966		5,270		(4,436	)		834
Total		$	50,530	$	(35,430	)	$	15,100	$	50,530	$	(35,982	)	$	14,548

Schedule of Estimated Amortization Expense of Capitalized Software and Intangible Assets

Based on capitalized intangible assets as of March 31, 2020, estimated amortization expense amounts in future fiscal years are as follows (unaudited and in thousands):

Year ending December 31,	Amortization
2020 (April - December)	$	1,654
2021		2,118
2022		1,603
2023		1,498
2024		1,498
Thereafter		6,177
Total amortization	$	14,548

Debt (Tables)

3 Months Ended

Mar. 31, 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 March 31, 2020 (in thousands):

	December 31,			March 31,
	2019			2020
				(unaudited)
Term loan facility	$	65,250		$	62,750
Revolving credit facility		—			10,000
Less debt issuance costs		(1,638	)		(1,501	)
Total debt		63,612			71,249
Less current portion of term facility		(10,000	)		(10,000	)
Current portion of debt issuance costs		546			546
Total long-term external debt	$	54,158		$	61,795

Schedule of Maturities on External Debt Outstanding

Maturities on the external debt outstanding at March 31, 2020 is as follows (unaudited and in thousands):

Year ending December 31,
2020 (April - December)	$	7,500
2021		10,000
2022		55,250
Total	$	72,750

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	June 30, 2020	September 30, 2020	December 31, 2020	March 31, 2020
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	2.75:1.00	2.50:1.00	2.50:1.00	2.25:1.00
Quarterly consolidated leverage ratio	Time period	Trailing twelve-month

Share Based Compensation (Tables)

3 Months Ended

Mar. 31, 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 three-month period ended March 31, 2020:

	Number of shares
Available for grant at December 31, 2019		426,022
2019 Share Incentive Plan		1,283,649
RSUs granted		(470,000	)
Shares withheld in settlement of taxes		7,932
Forfeitures		155,000
Available for grant at March 31, 2020		1,402,603

Schedule of Total Share Based Compensation Expense

The following table shows total share-based compensation expense for the three-month periods ended March 31, 2019 and 2020 (unaudited and in thousands):

	Three Months Ended March 31,
	2019		2020
			(unaudited)
Cost of revenues	$	—	$	17
Research and development		—		368
Sales and marketing		—		232
General and administrative		—		194
Total share-based compensation expense	$	—	$	811

Summary of Stock Option Activity

The following is a summary of option activity for the Company’s share incentive plans for the three-month period ended March 31, 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 forfeited		(155,000	)	$	10.72		—	$	—
Outstanding at March 31, 2020		2,765,500		$	10.38		9.4	$	—
Options exercisable at March 31, 2020		165,000		$	12.00		9.2	$	—
Options vested and expected to vest at March 31, 2020		2,578,105		$	10.42		9.4	$	—

Schedule of Estimated Fair Value of Weighted Average Assumptions

	Three Months Ended March 31,
	2020
Expected dividend yield		—
Risk-free interest rate		1.80	%
Weighted-average expected volatility		40.8	%
Expected term (in years)		6.1
Weighted average grant-date fair value per share of options granted	$	4.34

Summary of Restricted Shares Activity

The following is a summary of restricted shares activity for the Company’s share incentive plans for the three-month period ended March 31, 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		470,000		$	4.50
RSUs and RSAs vested		(8,704	)	$	12.00
RSUs and RSAs forfeited		(5,078	)	$	12.00
RSU and RSA balance at March 31, 2020		713,337		$	7.06
RSUs and RSAs expected to vest at March 31, 2020		713,337		$	7.06

Share Capital - Shares (Tables)

3 Months Ended

Mar. 31, 2020

Stockholders Equity Note [Abstract]

Shares (Share Capital Activity)

The following table reflects the share capital activity:

	Number of shares			Value (in thousands)
Balance at December 31, 2019		25,672,983		$	3
Shares withheld for net settlement of shares issued		(7,932	)		—
Issuance of vested shares		15,154			—
Balance at March 31, 2020		25,680,205		$	3
As of March 31, 2020, no dividends have been declared or paid.

Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2019		2020
Numerator:
Net income (loss)	$	1,862	$	(838	)
Denominator:
Weighted average shares outstanding used in computing net income (loss), basic and diluted		13,600,411		25,677,179
Net income (loss) per share, basic and diluted	$	0.14	$	(0.03	)

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

	Three Months Ended March 31,
	2019		2020
			(unaudited)
Share options		—		2,766
Restricted shares (RSUs and RSAs)		—		713
Total		—		3,479

Segment Information and Revenues by Geography (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2019				2020
Point-to-Multi-Point	$	42,327	62	%	$	34,867	58	%
Point-to-Point		19,634	29	%		13,110	22	%
Wi-Fi		5,586	8	%		11,481	19	%
Other		565	1	%		971	1	%
Total Revenues	$	68,112	100	%	$	60,429	100	%

Schedule of Revenues by Geography

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

	Three Months Ended March 31,
	2019				2020
North America	$	34,364	50	%	$	31,035	51	%
Europe, Middle East and Africa		21,970	32	%		18,744	31	%
Caribbean and Latin America		7,099	10	%		5,230	9	%
Asia Pacific		4,679	8	%		5,420	9	%
Total Revenues	$	68,112	100	%	$	60,429	100	%

Revenues from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2020

Revenue From Contract With Customer [Abstract]

Summary of Contract Balances

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

	December 31, 2019		March 31, 2020
			(unaudited)
Trade accounts receivable, net of allowance for credit losses	$	58,254	$	61,370
Deferred revenue - current		7,430		6,331
Deferred revenue - noncurrent		4,852		4,337
Refund liability	$	2,223	$	3,052

Leases (Tables)

3 Months Ended

Mar. 31, 2020

Leases [Abstract]

Components of Lease Expense

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

	Three Months Ended March 31, 2019		Three Months Ended March 31, 2020
	(unaudited)		(unaudited)
Operating lease cost	$	586	$	644
Short-term lease cost		59		27
Variable lease costs		61		109
Total lease expense	$	706	$	780

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			March 31, 2020
Operating leases:
Operating lease assets	Operating lease assets	$	6,872		$	6,443
Current lease liabilities	Other current liabilities	$	2,125		$	2,208
Noncurrent lease liabilities	Noncurrent operating lease liabilities	$	5,335		$	4,724
Weighted average remaining lease term (years):
Operating leases			3.98			3.75
Weighted average discount rate:
Operating leases			8.50	%		8.50	%

Supplemental Cash Flow Information

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

	Three months ended March 31,		Three months ended March 31,
	2019		2020
Supplemental cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$	610	$	747

Remaining Maturities on Lease Liabilities

Remaining maturities on lease liabilities as of March 31, 2020 is as follows (unaudited and in thousands):

	Operating leases
2020 (excludes the three months ended March 31, 2020)	$	2,038
2021		2,471
2022		1,349
2023		1,292
2024		537
Thereafter		448
Total lease payments		8,135
Less: interest		1,203
Present value of lease liabilities	$	6,932

Restructuring (Tables)

3 Months Ended

Mar. 31, 2020

Restructuring And Related Activities [Abstract]

Schedule of Restructuring Liability Activity

The following table reflects the restructuring liability activity for the three-month period ended March 31, 2020 (unaudited and in thousands):

Restructuring liability at December 31, 2019	$	138
Restructuring charges		1,152
Cost paid		(1,150	)
Restructuring liability at March 31, 2020	$	140

Business and Significant Accounting Policies - Additional Information (Details) - Customer	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
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%
Number of customers	2	4
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	3 Months Ended
	Aug. 31, 2019	Mar. 31, 2020
Business Acquisition [Line Items]
Cash paid upon closing of acquisition		$ 334
Xirrus Wi-Fi Business
Business Acquisition [Line Items]
Cash paid upon closing of acquisition	$ 2,000
Expected 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	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 9,493	$ 8,552	$ 8,060
Xirrus Wi-Fi Business
Business Acquisition [Line Items]
Goodwill	1,433
Deferred revenue	(7,460)
Other net assets acquired	2,817
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	Mar. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value credit agreement				$ 65.3	$ 72.8
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	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Notes And Loans Receivable [Line Items]
Total receivables	$ 62,296	$ 59,208
Less: Allowance for credit losses	(690)	(580)	$ (503)
Receivables, net	61,606	58,628
Trade Accounts Receivable
Accounts Notes And Loans Receivable [Line Items]
Total receivables	62,000	58,774
Other Receivables
Accounts Notes And Loans Receivable [Line Items]
Total receivables	$ 296	$ 434

Balance Sheet Components - Schedule of Allowance for Credit Losses Activity (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Accounts Receivable Net Current [Abstract]
Beginning balance	$ 580	$ 503
Increase, charged to expense	125	333
Recoveries	(15)	(204)
Amounts written-off		(52)
Ending balance	$ 690	$ 580

Balance Sheet Components - Schedule of Inventories, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Inventory Net [Abstract]
Finished goods	$ 31,659	$ 42,402
Raw materials	4,886	4,227
Gross inventory	36,545	46,629
Less: Excess and obsolete provision	(4,046)	(4,959)	$ (3,950)
Inventories, net	$ 32,499	$ 41,670

Balance Sheet Components - Schedule of Inventory Excess and Obsolete Provision (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Inventory Net [Abstract]
Beginning balance	$ 4,959	$ 3,950
Inventory written off	(1,290)	(149)
Increase in excess and obsolete provision	377	1,158
Ending balance	$ 4,046	$ 4,959

Balance Sheet Components - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accrued Liabilities Current [Abstract]
Accrued goods and services	$ 8,113	$ 8,364
Accrued inventory purchases	2,417	3,094
Accrued customer rebates	4,479	3,569
Other	8	7
Accrued liabilities	$ 15,017	$ 15,034

Balance Sheet Components - Schedule of Change to Accrued Warranty (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Standard Product Warranty Disclosure [Abstract]
Beginning balance	$ 706	$ 488
Warranties assumed due to acquisition	825	180
Fulfillment of assumed acquisition warranty	(164)
Provision increase, net	55	38
Ending balance	$ 1,422	$ 706

Balance Sheet Components - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Product Warranty Liability [Line Items]
Accrued warranty	$ 1,422	$ 706	$ 488
Other Current Liabilities
Product Warranty Liability [Line Items]
Accrued warranty	900	$ 700
Other Noncurrent Liabilities
Product Warranty Liability [Line Items]
Accrued warranty	$ 500

Property and Equipment - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Total cost	$ 26,525	$ 25,787
Less: Accumulated depreciation	(18,261)	(17,473)
Property and equipment, net	8,264	8,314
Equipment and Tooling
Property Plant And Equipment [Line Items]
Total cost	$ 22,614	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	$ 2,892	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	$ 737	$ 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
	Mar. 31, 2020	Mar. 31, 2019
Property Plant And Equipment [Abstract]
Depreciation expense	$ 955	$ 882

Software - Schedule of Software (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 17,795	$ 17,675
Accumulated amortization	(14,610)	(14,280)
Net balance	3,185	3,395
Acquired and Software for Internal Use
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	15,884	15,870
Accumulated amortization	(13,650)	(13,471)
Net balance	$ 2,234	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	$ 1,911	1,805
Accumulated amortization	(960)	(809)
Net balance	$ 951	$ 996

Software - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Acquired and Software for Internal Use
Finite Lived Intangible Assets [Line Items]
Amortization expense	$ 0.2	$ 0.1
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	$ 0.1

Software - Schedule of Estimated Amortization Expense of Capitalized Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
2020 (April - December)	$ 1,654
2021	2,118
2022	1,603
2023	1,498
2024	1,498
Thereafter	6,177
Total amortization	14,548	$ 15,100
Capitalized Software Assets
Finite Lived Intangible Assets [Line Items]
2020 (April - December)	1,012
2021	1,028
2022	589
2023	228
2024	115
Thereafter	213
Total amortization	3,185
Capitalized Software Assets \| Acquired and Internal Use Software
Finite Lived Intangible Assets [Line Items]
2020 (April - December)	550
2021	698
2022	449
2023	209
2024	115
Thereafter	213
Total amortization	2,234
Capitalized Software Assets \| Software Marketed for External Use
Finite Lived Intangible Assets [Line Items]
2020 (April - December)	462
2021	330
2022	140
2023	19
Total amortization	$ 951

Goodwill and Intangible Assets - Additional Information (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) Segment Subsidiary Unit	Mar. 31, 2019 USD ($)
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	$ 300,000

Goodwill and Intangible Assets - Schedule of Change in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning balance	$ 8,552	$ 8,060
Additions attributable to acquisition	941	492
Ending balance	$ 9,493	$ 8,552

Goodwill and Intangible Assets - Schedule of Carrying Amount and Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 50,530	$ 50,530
Accumulated amortization	(35,982)	(35,430)
Total amortization	14,548	15,100
Unpatented Technology
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	14,660	14,660
Accumulated amortization	(14,240)	(14,195)
Total amortization	$ 420	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	(6,006)	(5,631)
Total amortization	$ 13,294	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	(4,436)	(4,304)
Total amortization	$ 834	$ 966

Goodwill and Intangible Assets - Schedule of Estimated Amortization Expense of Capitalized Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets Net [Abstract]
2020 (April - December)	$ 1,654
2021	2,118
2022	1,603
2023	1,498
2024	1,498
Thereafter	6,177
Total amortization	$ 14,548	$ 15,100

Debt - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended
	Jun. 28, 2019	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Debt Instrument [Line Items]
Debt outstanding				$ 72,750
Proceeds from credit facility				10,000
Interest expense				2,300	$ 1,300
Term Loan Facility
Debt Instrument [Line Items]
Debt outstanding				$ 62,750		$ 65,250
Debt instrument interest rate				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				$ 10,000
Proceeds from credit facility				$ 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	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term debt, Gross	$ 72,750
Less debt issuance costs	(1,501)	$ (1,638)
Total debt	71,249	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	61,795	54,158
Term Loan Facility
Debt Instrument [Line Items]
Long-term debt, Gross	62,750	$ 65,250
Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, Gross	$ 10,000

Debt - Schedule of Maturities on External Debt Outstanding (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Maturities Of Long Term Debt [Abstract]
2020 (April - December)	$ 7,500
2021	10,000
2022	55,250
Total	$ 72,750

Debt - Schedule of Current Debt Compliance with Covenant (Details)	3 Months Ended
	Mar. 31, 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 second quarter	125.00%
Consolidated fixed charge coverage ratio third quarter	125.00%
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 description, twelve month	Trailing twelve-month
Consolidated leverage coverage ratio second quarter	275.00%
Consolidated leverage coverage ratio third quarter	250.00%
Consolidated leverage ratio fourth quarter	250.00%
Consolidated leverage ratio first quarter of next year	225.00%
Consolidated leverage ratio description, twelve month	Trailing twelve-month

Employee Benefit Plans - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 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	$ 0.2	$ 0.2
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

Other Expense (Income) - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Other Expenses
Other Non Operating Income and Expense [Line Items]
Foreign exchange (gains) and losses	$ (0.2)	$ 0.1

Share Based Compensation - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended
	Jun. 30, 2019	Mar. 31, 2020	Mar. 24, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted		470,000
Pretax unrecognized compensation expense		$ 12,700,000
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 exercised		$ 0
Share options exercised		0
Unrecognized pre-tax share based compensation expense related to unvested share option awards		$ 8,900,000
Shares vested		8,704
Unrecognized pre-tax compensation expense related to unvested share awards		$ 3,800,000
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%
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
Shares granted		470,000
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
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
2019 Share Incentive Plan \| Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares granted		470,000
Shares vested		8,704
Shares to pay emloyees’ portion of minimum payroll withholding taxes		1,480

Share Based Compensation - Summary of Changes in Number of Shares Available for Grant (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 24, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSUs granted	(470,000)
Forfeitures	155,000
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	(470,000)
Shares withheld in settlement of taxes	7,932
Forfeitures	155,000
Available for grant, ending balance	1,402,603

Share Based Compensation - Schedule of Total Share Based Compensation Expense (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	$ 811
Cost of Revenues
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	17
Research and Development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	368
Sales and Marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	232
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	$ 194

Share Based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Options
Options outstanding, Beginning balance	2,920,500
Options forfeited	(155,000)
Options outstanding, Ending balance	2,765,500	2,920,500
Options exercisable	165,000
Options vested and expected to vest	2,578,105
Weighted average exercise price
Weighted average exercise price, Outstanding beginning balance	$ 10.40
Weighted average exercise price, Options forfeited	10.72
Weighted average exercise price, Outstanding ending balance	10.38	$ 10.40
Weighted average exercise price, Options exercisable	12.00
Weighted average exercise price, Options vested and expected to vest	$ 10.42
Weighted average remaining contractual term (years)
Outstanding at December 31, 2019	9 years 4 months 24 days	9 years 7 months 6 days
Outstanding at December 31, 2019	9 years 4 months 24 days	9 years 7 months 6 days
Weighted average remaining contractual term, options exercisable	9 years 2 months 12 days
Weighted average remaining contractual term, options vested and expected to vest	9 years 4 months 24 days
Aggregate intrinsic value, Outstanding, Beginning balance		$ 1,932,000

Share Based Compensation - Schedule of Estimated Fair Value of Weighted Average Assumptions (Details)	3 Months Ended
	Mar. 31, 2020 $ / shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Risk-free interest rate	1.80%
Weighted-average expected volatility	40.80%
Expected term (in years)	6 years 1 month 6 days
Weighted average grant-date fair value per share of options granted	$ 4.34

Share Based Compensation - Summary of Restricted Shares Activity (Details)	3 Months Ended
	Mar. 31, 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	470,000
Number of Units, RSU and RSA, vested \| shares	(8,704)
Number of Units, RSU and RSA, forfeited \| shares	(5,078)
Number of Units, RSU and RSA, ending balance \| shares	713,337
Number of Units, RSUs and RSAs, expected to vest \| shares	713,337
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	4.50
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	7.06
Weighted average grant date fair value, RSU and RSA, expected to vest \| $ / shares	$ 7.06

Share Capital - Shares (Share Capital Activity) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) shares
Stockholders Equity Note [Abstract]
Beginning balance, shares	25,672,983
Shares withheld for net settlement of shares issued, Number of shares	(7,932)
Issuance of vested shares, Number of shares	15,154
Ending balance, shares	25,680,205
Beginning balance \| $	$ 3
Ending balance \| $	$ 3

Share Capital - Shares - Additional Information (Details)	3 Months Ended
	Mar. 31, 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
	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net income (loss)	$ (838)	$ 1,862
Denominator:
Weighted average shares outstanding used in computing net income (loss), basic and diluted	25,677,179	13,600,411
Net income (loss) per share, basic and diluted	$ (0.03)	$ 0.14

- Definition

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

+ References + Details

Earnings Per Share - Schedule of Anti-dilutive Securities Excluded from Computation of Diluted Net Loss Per Share (Details) shares in Thousands	3 Months Ended
	Mar. 31, 2020 shares
Anti-dilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of diluted net loss per share	3,479
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	2,766
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	713

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 82	$ 415
Effective tax rate	(10.80%)	18.20%
Statutory rate	21.00%

Segment Information and Revenues by Geography - Additional Information (Details)	3 Months Ended
	Mar. 31, 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
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 60,429	$ 68,112
Sales Revenue, Product Line \| Product Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	100.00%	100.00%
Point-to-Multi-Point
Segment Reporting Information [Line Items]
Revenues	$ 34,867	$ 42,327
Point-to-Multi-Point \| Sales Revenue, Product Line \| Product Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	58.00%	62.00%
Point-to-Point
Segment Reporting Information [Line Items]
Revenues	$ 13,110	$ 19,634
Point-to-Point \| Sales Revenue, Product Line \| Product Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	22.00%	29.00%
Wi-Fi
Segment Reporting Information [Line Items]
Revenues	$ 11,481	$ 5,586
Wi-Fi \| Sales Revenue, Product Line \| Product Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	19.00%	8.00%
Other
Segment Reporting Information [Line Items]
Revenues	$ 971	$ 565
Other \| Sales Revenue, Product Line \| Product Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	1.00%	1.00%

Segment Information and Revenues by Geography - Schedule of Revenues by Geography (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 60,429	$ 68,112
Sales Revenue, Product Line \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	100.00%	100.00%
North America
Segment Reporting Information [Line Items]
Revenues	$ 31,035	$ 34,364
North America \| Sales Revenue, Product Line \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	51.00%	50.00%
Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Revenues	$ 18,744	$ 21,970
Europe, Middle East and Africa \| Sales Revenue, Product Line \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	31.00%	32.00%
Caribbean and Latin America
Segment Reporting Information [Line Items]
Revenues	$ 5,230	$ 7,099
Caribbean and Latin America \| Sales Revenue, Product Line \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	9.00%	10.00%
Asia Pacific
Segment Reporting Information [Line Items]
Revenues	$ 5,420	$ 4,679
Asia Pacific \| Sales Revenue, Product Line \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	9.00%	8.00%

Revenues from Contracts with Customers - Summary of Contract Balances (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Trade accounts receivable, net of allowance for credit losses	$ 61,370	$ 58,254
Deferred revenues	6,331	7,430
Deferred revenues	4,337	4,852
Refund liability	$ 3,052	$ 2,223

Revenues from Contracts with Customers - Additional Information (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) Customer	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($) Customer
Revenue From Contract With Customer [Line Items]
Deferred revenue	$ 10.7		$ 12.3
Revenue remaining performance obligation	6.3		$ 7.4
Revenue recognized	$ 2.7	$ 1.3
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)	Mar. 31, 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: 2020-04-01
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
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating lease cost	$ 644	$ 586
Short-term lease cost	27	59
Variable lease costs	109	61
Total lease expense	$ 780	$ 706

Leases - Supplemental Balance Sheet Information related to Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Operating leases:
Operating lease assets	$ 6,443	$ 6,872
Current lease liabilities	$ 2,208	$ 2,125
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent
Noncurrent operating lease liabilities	$ 4,724	$ 5,335
Weighted average remaining lease term (years):
Operating leases	3 years 9 months	3 years 11 months 23 days
Weighted average discount rate:
Operating leases	8.50%	8.50%

Leases - Supplemental Cash Flow Information related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Supplemental cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$ 747	$ 610

Leases - Additional Information (Details)	3 Months Ended
Leases - Additional Information (Details)	Mar. 31, 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	Mar. 31, 2020 USD ($)
Leases [Abstract]
2020 (excludes the three months ended March 31, 2020)	$ 2,038
2021	2,471
2022	1,349
2023	1,292
2024	537
Thereafter	448
Total lease payments	8,135
Less: interest	1,203
Present value of lease liabilities	$ 6,932

Related Party Transactions - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Vector Capital Management L.P.
Related Party Transaction [Line Items]
Management and oversight fees	$ 0.0	$ 0.1

Restructuring - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 1,152	$ 700
Restructuring charges included in Accrued liabilities	100	$ 100
Payments for restructuring	1,100
Initial Restructuring
Restructuring Cost And Reserve [Line Items]
Payments for restructuring	$ 100

Restructuring - Schedule of Restructuring Liability Activity (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Restructuring And Related Activities [Abstract]
Restructuring liability at December 31, 2019	$ 138
Restructuring charges	1,152	$ 700
Cost paid	(1,150)
Restructuring liability at March 31, 2020	$ 140	$ 138