Casa Systems (CASSQ) 10-Q 8 Aug 23 2023 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2023	Aug. 02, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Trading Symbol	CASA
Entity Registrant Name	Casa Systems, Inc.
Entity Central Index Key	0001333835
Current Fiscal Year End Date	--12-31
Document Quarterly Report	true
Document Transition Report	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Shell Company	false
Entity Small Business	true
Entity Emerging Growth Company	false
Entity File Number	001-38324
Entity Tax Identification Number	75-3108867
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	100 Old River Road
Entity Address, City or Town	Andover
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01810
City Area Code	978
Local Phone Number	688-6706
Entity Common Stock, Shares Outstanding		97,171,333
Title of 12(b) Security	Common Stock, $0.001 par value per share
Security Exchange Name	NASDAQ

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands		Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents		$ 64,265	$ 126,312
Accounts receivable, net of provision for doubtful accounts of $149 and $636 as of June 30, 2023 and December 31, 2022, respectively	[1]	47,400	74,484
Inventory		84,085	81,795
Prepaid expenses and other current assets		4,927	2,836
Prepaid income taxes		3,421	6,352
Total current assets		204,098	291,779
Property and equipment, net		17,601	19,518
Right-of-use assets		4,220	5,199
Goodwill		50,177	50,177
Intangible assets, net		22,833	25,759
Other assets		5,018	5,862
Total assets		303,947	398,294
Current liabilities:
Accounts payable		21,560	29,283
Accrued expenses and other current liabilities		35,575	31,825
Warrant liability		15,232
Accrued income taxes		1,067	4,298
Deferred revenue	[2]	53,598	31,305
Lease liability		1,715	2,040
Current portion of long-term debt, net of unamortized debt issuance costs		6,349	225,161
Total current liabilities		135,096	323,912
Accrued income taxes, net of current portion		6,426	6,640
Deferred tax liabilities		1,414	1,490
Deferred revenue, net of current portion		4,599	5,529
Long-term debt, net of current portion and unamortized debt issuance costs		171,918
Warrant Liability, net of current portion		5,073
Lease liability, long-term		2,741	3,416
Other liabilities, net of current portion		7,768	7,906
Total liabilities		335,035	348,893
Commitments and contingencies (Note 18)
Total stockholders' (deficit) equity
Preferred stock, $0.001 par value; 5,000 shares authorized; no shares issued and outstanding as of June 30, 2023 and December 31, 2022
Common stock, $0.001 par value; 500,000 shares authorized; 100,610 and 98,262 shares issued as of June 30, 2023 and December 31, 2022, respectively; 97,013 and 94,665 shares outstanding as of June 30, 2023 and December 31, 2022, respectively		101	98
Treasury stock, at cost; 3,597 shares as of June 30, 2023 and December 31, 2022		(14,837)	(14,837)
Additional paid-in capital		247,609	244,675
Accumulated other comprehensive loss		(2,937)	(2,305)
Accumulated deficit		(261,024)	(178,230)
Total stockholders' (deficit) equity		(31,088)	49,401
Total liabilities and stockholders' (deficit) equity		$ 303,947	$ 398,294
[1] Includes accounts receivable due from a related party of $ 3,635 and $ 6,044 at June 30, 2023 and December 31, 2022, respectively (see Note 16) Includes deferred revenue associated with a related party of $ 33,913 and $ 18,094 at June 30, 2023 and December 31, 2022, respectively (see Note 16)

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Provision for doubtful accounts	$ 149	$ 636
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares, outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	100,610,000	98,262,000
Common stock, shares outstanding	97,013,000	94,665,000
Treasury stock, shares	3,597,000	3,597,000
Accounts receivable due from related party	$ 3,635	$ 6,044
Deferred revenue associated with related party	$ 33,913	$ 18,094

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue:
Total revenue	[1],[2]	$ 58,003	$ 70,836	$ 103,300	$ 135,235
Cost of revenue:
Total cost of revenue		34,187	44,201	61,329	81,921
Gross profit		23,816	26,635	41,971	53,314
Operating expenses:
Research and development		19,986	22,813	40,826	45,486
Selling, general and administrative		20,985	21,970	45,442	44,299
Total operating expenses		40,971	44,783	86,268	89,785
Loss from operations		(17,155)	(18,148)	(44,297)	(36,471)
Other income (expense):
Interest income		853	274	1,819	308
Interest expense		(5,976)	(3,820)	(11,184)	(7,508)
Loss on extinguishment of debt	[3]	(28,955)		(28,822)
Gain on foreign currency, net		680	816	388	543
Other income, net		577	161	610	179
Total other expense, net		(32,821)	(2,569)	(37,189)	(6,478)
Loss before provision for (benefit from) income taxes		(49,976)	(20,717)	(81,486)	(42,949)
Provision for (benefit from) income taxes		1,160	(4,020)	1,308	6,332
Net loss		(51,136)	(16,697)	(82,794)	(49,281)
Other comprehensive loss - foreign currency translation adjustment, net of tax		(940)	(2,065)	(632)	(1,946)
Comprehensive loss		$ (52,076)	$ (18,762)	$ (83,426)	$ (51,227)
Net loss per share attributable to common stockholders:
Basic		$ (0.53)	$ (0.18)	$ (0.86)	$ (0.56)
Diluted		$ (0.53)	$ (0.18)	$ (0.86)	$ (0.56)
Weighted-average shares used to compute net loss per share attributable to common stockholders:
Basic		96,816	92,504	96,307	88,565
Diluted		96,816	92,504	96,307	88,565
Product
Revenue:
Total revenue		$ 45,987	$ 59,141	$ 81,236	$ 111,686
Cost of revenue:
Total cost of revenue		33,009	42,882	59,024	79,110
Service
Revenue:
Total revenue		12,016	11,695	22,064	23,549
Cost of revenue:
Total cost of revenue		$ 1,178	$ 1,319	$ 2,305	$ 2,811
[1] Includes revenue of $ 4,287 and $ 7,283 during the three and six months ended June 30, 2023 and $ 10,550 during the three and six months ended June 30, 2022 , during which a related party relationship existed (see Note 16) Other than the United States, Canada and Australia, no individual countries represented 10 % or more of the Company’s total revenue for any of the periods presented. Loss related to Term Loan B refinancing and issuance of warrants during the three and six months ended June 30, 2023 (see Note 10)

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenue from related party	$ 4,287	$ 10,550	$ 7,283	$ 10,550

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' (DEFICIT) EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Balances at Dec. 31, 2021	$ 81,919	$ 88		$ 193,654	$ 878	$ (99,056)
Balances, shares at Dec. 31, 2021		87,815
Balance Treasury, shares at Dec. 31, 2021			3,393
Balance Treasury at Dec. 31, 2021			$ (13,645)
Exercise of stock options and common stock issued upon vesting of equity awards, net of shares withheld for employee taxes	(1,374)	$ 1		(1,375)
Exercise of stock options and common stock issued upon vesting of equity awards, net of shares withheld for employee taxes, shares		871
Foreign currency translation adjustment	(1,946)				(1,946)
Repurchases of treasury shares	(1,192)		$ (1,192)
Repurchases of treasury shares, shares			204
Sale of common stock, net of issuance costs, Shares		9,323
Sale of common stock, net of issuance costs	39,370	$ 9		39,361
Stock-based compensation	5,666			5,666
Net loss	(49,281)					(49,281)
Balances at Jun. 30, 2022	73,162	$ 98		237,306	(1,068)	(148,337)
Balances, shares at Jun. 30, 2022		98,009
Balance Treasury, shares at Jun. 30, 2022			3,597
Balance Treasury at Jun. 30, 2022			$ (14,837)
Balances at Mar. 31, 2022	49,581	$ 88		194,973	997	(131,640)
Balances, shares at Mar. 31, 2022		88,452
Balance Treasury, shares at Mar. 31, 2022			3,597
Balance Treasury at Mar. 31, 2022			$ (14,837)
Exercise of stock options and common stock issued upon vesting of equity awards, net of shares withheld for employee taxes	38	$ 1		37
Exercise of stock options and common stock issued upon vesting of equity awards, net of shares withheld for employee taxes, shares		234
Foreign currency translation adjustment	(2,065)				(2,065)
Sale of common stock, net of issuance costs, Shares		9,323
Sale of common stock, net of issuance costs	39,370	$ 9		39,361
Stock-based compensation	2,935			2,935
Net loss	(16,697)					(16,697)
Balances at Jun. 30, 2022	73,162	$ 98		237,306	(1,068)	(148,337)
Balances, shares at Jun. 30, 2022		98,009
Balance Treasury, shares at Jun. 30, 2022			3,597
Balance Treasury at Jun. 30, 2022			$ (14,837)
Balances at Dec. 31, 2022	$ 49,401	$ 98		244,675	(2,305)	(178,230)
Balances, shares at Dec. 31, 2022		98,262
Balance Treasury, shares at Dec. 31, 2022	3,597		3,597
Balance Treasury at Dec. 31, 2022	$ 14,837		$ (14,837)
Exercise of stock options and common stock issued upon vesting of equity awards, net of shares withheld for employee taxes	(2,993)	$ 3		(2,996)
Exercise of stock options and common stock issued upon vesting of equity awards, net of shares withheld for employee taxes, shares		2,348
Foreign currency translation adjustment	(632)				(632)
Stock-based compensation	5,930			5,930
Net loss	(82,794)					(82,794)
Balances at Jun. 30, 2023	$ (31,088)	$ 101		247,609	(2,937)	(261,024)
Balances, shares at Jun. 30, 2023		100,610
Balance Treasury, shares at Jun. 30, 2023	3,597		3,597
Balance Treasury at Jun. 30, 2023	$ 14,837		$ (14,837)
Balances at Mar. 31, 2023	19,236	$ 100		245,858	(1,997)	(209,888)
Balances, shares at Mar. 31, 2023		100,314
Balance Treasury, shares at Mar. 31, 2023			3,597
Balance Treasury at Mar. 31, 2023			$ (14,837)
Exercise of stock options and common stock issued upon vesting of equity awards, net of shares withheld for employee taxes	(56)	$ 1		(57)
Exercise of stock options and common stock issued upon vesting of equity awards, net of shares withheld for employee taxes, shares		296
Foreign currency translation adjustment	(940)				(940)
Stock-based compensation	1,808			1,808
Net loss	(51,136)					(51,136)
Balances at Jun. 30, 2023	$ (31,088)	$ 101		$ 247,609	$ (2,937)	$ (261,024)
Balances, shares at Jun. 30, 2023		100,610
Balance Treasury, shares at Jun. 30, 2023	3,597		3,597
Balance Treasury at Jun. 30, 2023	$ 14,837		$ (14,837)

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022
Operating activities:
Net loss		$ (82,794)	$ (49,281)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization		5,739	7,140
Stock-based compensation		5,930	5,507
Deferred income taxes		(77)	(2,210)
Change in provision for doubtful accounts		(487)	152
Change in provision for excess and obsolete inventory		2,934	4,230
Gain on disposal of assets		12
Non-cash operating lease expense		1,138
Loss on extinguishment of debt	[1]	28,822
Changes in operating assets and liabilities:
Accounts receivable		27,155	17,585
Inventory		(5,251)	2,249
Prepaid expenses and other assets		(2,746)	1,226
Prepaid income taxes		2,943	21,441
Accounts payable		(6,549)	(13,865)
Accrued expenses and other current liabilities		2,352	(11,375)
Operating lease liabilities		(1,055)
Accrued income taxes		(3,440)	3,839
Deferred revenue		21,382	22,972
Net cash (used in) provided by operating activities		(3,992)	9,610
Investing activities:
Purchases of property and equipment		(984)	(1,597)
Purchases of software licenses		(92)	(513)
Net cash used in investing activities		(1,076)	(2,110)
Financing activities:
Principal repayments of debt		(41,988)	(1,500)
Payment for debt issuance costs		(13,279)
Proceeds from exercise of stock options		2	254
Employee taxes paid related to net share settlement of equity awards		(2,995)	(1,628)
Proceeds from sale of common stock, net of issuance costs			39,370
Payments of dividends and equitable adjustments			(1)
Repurchases of common stock			(1,192)
Net cash (used in) provided by financing activities		(58,260)	35,303
Effect of exchange rate changes on cash and cash equivalents		(207)	(1,671)
Net (decrease) increase in cash, cash equivalents and restricted cash		(63,535)	41,132
Cash, cash equivalents and restricted cash at beginning of period		129,425	157,804
Cash, cash equivalents and restricted cash at end of period	[2]	65,890	198,936
Supplemental disclosures of cash flow information:
Cash paid for interest		9,114	6,999
Cash paid for income taxes		4,129	7,511
Supplemental disclosures of non-cash operating, investing and financing activities:
Purchases of property and equipment included in accounts payable		$ 20	$ 469
[1] Loss related to Term Loan B refinancing and issuance of warrants during the three and six months ended June 30, 2023 (see Note 10) See Note 2 of the accompanying notes for a reconciliation of the ending balance of cash, cash equivalents and restricted cash shown in these unaudited condensed consolidated statements of cash flows.

Nature of Business and Basis of

Nature of Business and Basis of Presentation	6 Months Ended
	Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business and Basis of Presentation	1. Nature of Business and Basis of Presentation Casa Systems, Inc. (the “Company”) was incorporated under the laws of the State of Delaware on February 28, 2003. The Company is a global communications technology company headquartered in Andover, Massachusetts and has wholly- owned subsidiaries in China, France, Canada, Ireland, Spain, the Netherlands, Hong Kong, Australia, Germany, the United Kingdom, the United States and New Zealand. The Company offers physical, virtual and cloud-native 5G infrastructure and customer premise networking equipment solutions to help communications service providers ("CSPs"), transform and expand their public and private high-speed data and multi-service communications networks so they can meet the growing demand for bandwidth and new services. Through the development of cloud, access devices and cable products, the Company’s core and edge convergence technology enables CSPs and enterprises to cost-effectively and dynamically increase network speed, add bandwidth capacity and new services, reduce network complexity and reduce operating and capital expenditures regardless of access technology. As technology has changed, the Company is now viewing offerings across three major product lines, cloud, access devices (which includes the Company's 4G/5G cell radio products) and cable, as opposed to our historical view of cable, wireless and fixed telco. The Company's revenue disclosures have been updated accordingly. The Company is subject to a number of risks similar to other companies of comparable size and other companies selling and providing services to the CSP industry. These risks include, but are not limited to, the level of capital spending by CSPs, lengthy sales cycles, dependence on the development of new products and services, unfavorable economic and market conditions, competition from larger and more established companies, limited management resources, dependence on a limited number of contract manufacturers and suppliers, the rapidly changing nature of the technology used by CSPs, and reliance on resellers and sales agents. Failure by the Company to anticipate or to respond adequately to technological developments in its industry, changes in customer or supplier requirements, changes in regulatory requirements or industry standards, or any significant delays in the development or introduction of products could have a material adverse effect on the Company’s operating results, financial condition and cash flows. Prior to December 31, 2022, the Company was an “emerging growth company,” as defined in the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”). The JOBS Act provided that an emerging growth company can take advantage of the extended transition period afforded by the JOBS Act for the implementation of new or revised accounting standards. The Company elected not to “opt out” of such extended transition period, which means that when a standard was issued or revised and it had different application dates for public or private companies, the Company was required to adopt the new or revised standard at or prior to the time private companies were required to adopt the new or revised standard. As of December 31, 2022, the Company no longer qualifies as an emerging growth company and will now be required to adopt new or revised standards at the same time as other public companies. The accompanying condensed consolidated balance sheet as of June 30, 2023, the condensed consolidated statements of operations and comprehensive loss for the three and six months ended June 30, 2023 and 2022, the condensed consolidated statements of cash flows for the six months ended June 30, 2023 and 2022, and the condensed consolidated statements of stockholders’ equity for the three and six months ended June 30, 2023 and 2022 are unaudited. The financial data and other information disclosed in these notes related to the three and six months ended June 30, 2023 and 2022 are also unaudited. The accompanying condensed consolidated balance sheet as of December 31, 2022 was derived from the Company’s audited consolidated financial statements for the year ended December 31, 2022, which was included in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on March 15, 2023 (the “Annual Report on Form 10-K”). The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) regarding interim financial reporting. Certain information and note disclosures normally included in the consolidated financial statements prepared in accordance with GAAP have been condensed or omitted. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Annual Report on Form 10-K. There have been no changes to the Company’s accounting policies from those disclosed in the Annual Report on Form 10-K that would have a material impact on the Company’s condensed consolidated financial statements. The unaudited interim condensed consolidated financial statements have been prepared on a basis consistent with that used to prepare the audited annual consolidated financial statements and, in the opinion of management, include all adjustments consisting of only normal recurring adjustments, necessary for a fair statement of the financial position, results of operations and cash flows for the interim periods, but are not necessarily indicative of the results of operations and cash flows to be anticipated for the full year ending December 31, 2023 or any future period. The accompanying condensed consolidated financial statements include the accounts and results of operations of the Company and its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. Certain prior period amounts have been reclassified to conform to the current period presentation. Going Concern In accordance with the accounting guidance related to the presentation of financial statements, when preparing financial statements for each annual and interim reporting period, management evaluates whether there are conditions or events that, when considered in the aggregate, raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date that the financial statements are issued. In making its assessment, management considered the Company’s current financial condition and liquidity sources including current funds available, forecasted future cash flows and conditional and unconditional obligations due over the next twelve months. The Company previously disclosed circumstances that gave rise to substantial doubt about the Company's ability to continue as a going concern. As of June 15, 2023, the Company believes those conditions were resolved as a result of the Company's June 15, 2023 refinancing of a substantial majority of the principal balance of the Original Term Loans under its December 20, 2016 credit facility, as further described in Note 10, Debt .

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2023
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Significant estimates and judgments relied upon by management in preparing these condensed consolidated financial statements include revenue recognition, reserves for excess and obsolete inventory, valuation of inventory and deferred inventory costs, the expensing and capitalization of software-related research and development costs, amortization and depreciation periods, the recoverability of net deferred tax assets, valuations of uncertain tax positions, warranty allowances, the valuation of equity instruments, warrants and embedded derivatives, and stock-based compensation expense. Although the Company regularly reassesses the assumptions underlying these estimates, actual results could differ materially from these estimates. Changes in estimates are recorded in the period in which they become known. The Company bases its estimates on historical experience and various other assumptions that it believes to be reasonable under the circumstances existing at the time such estimates are made. The COVID-19 pandemic disrupted the Company's global supply chain. Throughout 2022 and 2021, the Company experienced shipping bottlenecks and shortages of supply that resulted in its inability to fulfill certain customer orders within normal lead times. This adversely impacted the Company's revenue and operating results for the years ended December 31, 2022 and 2021. The Company also experienced, in some cases, significant increases in shipping costs. While the impact to the Company has subsided during 2023, the Company continues to work with its supply chain, contract manufacturers, logistics partners and customers to minimize the extent of such impacts and will continue to actively monitor supply chain developments. The Company cannot predict if or when such effects will recur or worsen, and in such a case, could prevent the Company from being able to fulfill its customers' orders in a timely manner or at all, which could lead to one or more of its customers canceling their orders. The Company would be neither able to estimate the extent of these impacts nor predict whether its efforts to minimize or contain them will be successful. In addition, the regions in which the Company operates have experienced a significant increase in inflation, which has adversely impacted the cost to manufacture the Company's products with limited ability to pass such increases on to its customers under previously established fixed price agreements. Inflation has further resulted in increased operating costs and interest rate increases, which will result in increased debt service costs. If interest rates continue to rise, the Company anticipates further adverse effects from inflation and increased interest rates. At this time, the Company is neither able to estimate the extent of these impacts nor predict whether its efforts to minimize or contain them will be successful. The Company will continue to monitor its business very closely for any effects of COVID-19, inflation and interest rate increases for as long as necessary. Subsequent Event Considerations The Company considers events or transactions that occur after the balance sheet date but prior to the issuance of the financial statements to provide additional evidence for certain estimates or to identify matters that require additional disclosure. Subsequent events have been evaluated as required. The Company has evaluated all subsequent events and determined that there are no additional material recognized or unrecognized subsequent events requiring disclosure in these condensed consolidated financial statements. Cash, Cash Equivalents and Restricted Cash Cash and cash equivalents include all highly liquid investments maturing within three months from the date of purchase. As of June 30, 2023 and December 31, 2022, the Company’s cash and cash equivalents consisted of investments in money market mutual funds. Restricted cash as of June 30, 2023 consisted of cash of $ 1,000 pledged as collateral for a stand-by letter of credit required to support a contractual obligation and cash of $ 625 pledged as collateral in connection with two letters of credit to support contractual obligations, as further discussed in Note 17, Leases . As of December 31, 2022 , restricted cash consisted of a certificate of deposit of $ 1,013 , pledged as collateral for a stand-by letter of credit required to support a contractual obligation, as well as cash of $ 2,100 , pledged as collateral in connection with two letters of credit to support contractual obligations, as further discussed in Note 17, Leases . The following table is a reconciliation of cash, cash equivalents and restricted cash included in the accompanying condensed consolidated balance sheets that sum to the total cash, cash equivalents and restricted cash included in the accompanying condensed consolidated statements of cash flows: June 30, 2023 June 30, 2022 Cash and cash equivalents $ 64,265 $ 195,832 Restricted cash included in other assets 1,625 3,104 $ 65,890 $ 198,936 Accounts Receivable Accounts receivable are presented net of a provision for doubtful accounts, which is an estimate of amounts that may not be collectible. Accounts receivable for customer contracts with customary payment terms, which are one year or less, are recorded at invoiced amounts and do not bear interest. The Company may, in limited circumstances, grant payment terms longer than one year. Payments due beyond 12 months from the balance sheet date are recorded as non-current assets. The Company generally does not require collateral, but the Company may, in certain instances based on its credit assessment, require full or partial prepayment prior to shipment. Accounts receivable as of June 30, 2023 and December 31, 2022 consisted of the following: June 30, December 31, Current portion of accounts receivable, net: Accounts receivable, net $ 47,400 $ 74,407 Accounts receivable, extended payment terms — 77 $ 47,400 $ 74,484 The Company performs ongoing credit evaluations of its customers and, if necessary, provides a provision for doubtful accounts and expected losses. When assessing and recording its provision for doubtful accounts, the Company evaluates the age of its accounts receivable, current economic trends, creditworthiness of the customer, customer payment history, and other specific customer and transaction information. The Company also provides an overall expected credit loss amount, based on historical loss rates, in accordance with ASC 326, Credit Losses . The Company writes off accounts receivable against the provision when it determines a balance is uncollectible and no longer actively pursues collection of the receivable. Adjustments to the provision for doubtful accounts are recorded as selling, general and administrative expenses in the condensed consolidated statements of operations and comprehensive loss. As of June 30, 2023 and December 31, 2022 , the Company concluded that all amounts due under extended payment terms were collectible and recorded no reserve for credit losses. During the six months ended June 30, 2023 and 2022 , the Company did no t provide a reserve for credit losses and did no t write off any uncollectible receivables due under extended payment terms. The Company has entered into a customer-sponsored program administered by an unrelated financial institution that allows for the sales (factor) of certain accounts receivable at discounted rates to the financial institution, without recourse. Transactions under this agreement were accounted for as a sale of accounts receivable and the related accounts receivable were removed from our condensed consolidated balance sheet at the time of the sales transaction. Under this agreement, we sold $ 20,773 of accounts receivables during the three and six months ended June 30, 2023 . Selling, general and administrative expenses include factoring costs associated with this accounts receivable sale program of $ 198 during the three and six months ended June 30, 2023 . Concentration of Risks Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash and cash equivalents and accounts receivable. Cash and cash equivalents consist of demand deposits, savings accounts, money market mutual funds, and certificates of deposit with financial institutions, which may exceed Federal Deposit Insurance Corporation limits. The Company has not experienced any losses related to its cash and cash equivalents and does not believe that it is subject to unusual credit risk beyond the normal credit risk associated with commercial banking relationships. The Company grants credit to customers in the ordinary course of business. Credit evaluations are performed on an ongoing basis to reduce credit risk, and no collateral is required from the Company’s customers. An allowance for uncollectible accounts is provided for those accounts receivable considered to be uncollectible based upon historical experience and credit evaluation. Due to these factors, no additional losses beyond the amounts provided for collection losses is believed by management to be probable in the Company’s accounts receivable. Significant customers are those that represent 10% or more of revenue or accounts receivable and are set forth in the following tables: Revenue Revenue Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Customer A * * * 11 % Customer B * 13 % * 12 % Customer C * 15 % * * Accounts Receivable, Net As of As of June 30, 2023 December 31, 2022 Customer D 12 % * Customer E 12 % * Customer F * 12 % Customer G * 11 % * Less than 10% of total Certain of the components and subassemblies included in the Company’s products are obtained and manufactured from a single source or a limited group of suppliers. Although the Company seeks to reduce dependence on those single or limited source suppliers, the partial or complete loss of certain of these sources could have a material adverse effect on the Company’s operating results, financial condition and cash flows and damage its customer relationships. Warrant Liability The Company’s liability for the Warrants, as further discussed and defined in Note 10, Debt , is based on a valuation model utilizing observable inputs from active markets. The fair value of the warrant liability is classified within Level 3 of the fair value hierarchy as it is based on significant inputs not observable in the market. The Company establishes the fair value for the Warrants using a Monte Carlo simulation model. Due to the variable number of shares for which the warrants were exercisable, they failed to qualify for equity classification under the indexation guidance in Accounting Standards Codification 815 ("ASC 815"). Therefore, the Warrants are classified as liabilities at fair value on the condensed consolidated balance sheet. Each reporting period, the Warrants are recorded at fair value, with changes in fair value recognized in the Company’s consolidated statement of operations within interest expense. Embedded Derivatives In connection with the Superpriority Credit Agreement, as defined in Note 10, Debt , the Company identified certain embedded features requiring bifurcation as derivatives under ASC 815. These embedded derivatives are required to be bifurcated from the debt host contract at fair value with subsequent changes in fair value recognized in earnings at each balance sheet date (see Note 8, Derivative Financial Instruments ). The Superpriority Term Loans, as defined and discussed in Note 10, Debt , include three embedded features; contingent interest upon an uncured event of default; mandatory prepayment upon certain excess cash flow; and mandatory prepayment upon an uncured event of default. Pursuant to ASC 815, these features have been identified as embedded derivative financial instruments. These embedded derivatives are required to be accounted for as derivatives and bifurcated from the host debt contract, resulting in remeasurement at each balance sheet date, with the change in fair value recognized in the Company’s condensed consolidated statement of operations. The fair value of the embedded derivatives is classified within Level 3 of the fair value hierarchy as it is based on significant inputs not observable in the market. The fair value of the embedded derivatives is based on a valuation model utilizing a with and without analysis of the embedded features within the debt facility. The Company runs a Monte Carlo simulation model with the embedded derivatives, and then runs a separate Monte Carlo simulation model for the overall debt facility, without the embedded derivative features. The difference between these two Monte Carlo simulation models is used to obtain the value of the embedded features. Impact of Recently Adopted or Issued Accounting Standards There have been no recently adopted or issued accounting standards that are applicable to the Company since December 31, 2022. Other Other than the disclosures above, there have been no changes to the significant accounting policies disclosed in Note 2 Summary of Significant Accounting Policies to the Company’s consolidated financial statements included in its Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	3. Goodwill and Intangible Assets Goodwill There have been no changes to the $ 50,177 carrying amount of goodwill during the three and six months ended June 30, 2023 and 2022. Intangible Assets Intangible assets, net consisted of intangible assets resulting from the acquisition of NetComm and purchased software to be used in the Company’s products. Intangible assets, net consisted of the following at June 30, 2023 and December 31, 2022, respectively: Cost Accumulated Net Balance Developed Technology $ 25,000 $ ( 14,288 ) $ 10,712 Customer Relationships 18,000 ( 7,200 ) 10,800 Trade Name 1,000 ( 1,000 ) — Purchased software 2,638 ( 1,317 ) 1,321 Totals as of June 30, 2023 $ 46,638 $ ( 23,805 ) $ 22,833 Cost Accumulated Net Balance Developed Technology $ 25,000 $ ( 12,502 ) $ 12,498 Customer Relationships 18,000 ( 6,300 ) 11,700 Trade Name 1,000 ( 1,000 ) — Purchased software 2,545 ( 984 ) 1,561 Totals as of December 31, 2022 $ 46,545 $ ( 20,786 ) $ 25,759 As of June 30, 2023, amortization expense on existing intangible assets for the next five years and beyond is as follows: Year Ending December 31, Remainder of 2023 $ 3,003 2024 5,929 2025 5,784 2026 3,617 2027 1,800 Thereafter 2,700 $ 22,833 A summary of amortization expense recorded during the three and six months ended June 30, 2023 and 2022 is as follows: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Product cost of revenue $ 893 $ 893 $ 1,786 $ 1,786 Research and development 169 141 333 244 Selling, general and administrative 450 533 900 1,070 Totals $ 1,512 $ 1,567 $ 3,019 $ 3,100

Inventory

Inventory	6 Months Ended
	Jun. 30, 2023
Inventory Disclosure [Abstract]
Inventory	4. Inventory Inventory as of June 30, 2023 and December 31, 2022 consisted of the following: June 30, December 31, Raw materials $ 40,053 $ 47,581 Finished goods: Manufactured finished goods 42,975 32,863 Deferred inventory costs 1,057 1,351 $ 84,085 $ 81,795

Property and Equipment

Property and Equipment	6 Months Ended
	Jun. 30, 2023
Property, Plant and Equipment [Abstract]
Property and Equipment	5. Property and Equipment Property and equipment as of June 30, 2023 and December 31, 2022 consisted of the following: June 30, December 31, Computers and purchased software $ 23,660 $ 25,572 Leasehold improvements 4,197 4,226 Furniture and fixtures 2,381 2,471 Machinery and equipment 24,834 34,502 Land 3,091 3,091 Building 4,765 4,765 Building improvements 7,391 7,374 Trial systems at customers’ sites 1,957 2,582 72,276 84,583 Less: Accumulated depreciation and amortization ( 54,675 ) ( 65,065 ) $ 17,601 $ 19,518 Depreciation and amortization expense on property and equipment totaled $ 1,341 and $ 1,958 for the three months ended June 30, 2023 and 2022 , respectively, and $ 2,720 and $ 4,040 , for the six months ended June 30, 2023 and 2022 , respectively.

Accrued Expenses and Other Curr

Accrued Expenses and Other Current Liabilities	6 Months Ended
	Jun. 30, 2023
Payables and Accruals [Abstract]
Accrued Expenses and Other Current Liabilities	6. Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities as of June 30, 2023 and December 31, 2022 consisted of the following: June 30, December 31, Current liabilities Accrued compensation and related taxes $ 14,671 $ 11,666 Accrued warranty 1,388 1,678 Inventory-related accruals 6,219 5,819 Warranty settlement provision (see Note 18) 3,659 3,761 Other accrued expenses 9,638 8,901 Accrued expenses and other current liabilities $ 35,575 $ 31,825 Non-current liabilities Warranty settlement provision, net of current portion (see Note 18) $ 5,911 $ 6,119 Other accrued expenses, net of current portion 1,857 1,787 Other liabilities, net of current portion $ 7,768 $ 7,906 On March 14, 2023, Jerry Guo, the Company’s co-founder, President and Chief Executive Officer, announced his retirement from his executive roles effective March 17, 2023. A separation agreement was entered into by Mr. Guo and the Company’s board of directors on March 13, 2023. Pursuant to this agreement, Mr. Guo was entitled to certain termination benefits, including accelerated vesting of stock awards, for which additional stock-based compensation of $ 1,737 was recognized in the six months ended June 30, 2023, as discussed in Note 12, Stock-based Compensation , all of which was accrued for during the three months ended March 31, 2023. The agreement also included separation pay, equal to the sum of (i) Mr. Guo's annual base salary at the rate in effect as of March 17, 2023 and (ii) Mr. Guo's target bonus for the calendar year 2023. During the six months ended June 30, 2023 , the Company accrued severance expenses of $ 2,199 related to Mr. Guo's separation agreement, which is included in accrued compensation and related taxes in the table above. Total expense recognized as a result of the separation agreement during the six months ended June 30, 2023 was $ 3,936 . Reduction in Force In April 2023, the Company approved a plan for a reduction in force. The Company reduced its workforce by 134 employees, representing approximately 13 % of the Company's total workforce. For the three and six months ended June 30, 2023 , the Company incurred $ 2,151 of employee severance payments and other employee-related costs. As of June 30, 2023, substantially all of these charges have been paid. Accrued Warranty Substantially all of the Company’s products are covered by warranties for software and hardware for periods ranging from 90 days to two years . In addition, in conjunction with customers’ renewals of maintenance and support contracts, the Company offers an extended warranty for periods typically of one to three years for agreed-upon fees. In the event of a failure of a hardware product or software covered by these warranties, the Company must repair or replace the software or hardware or, if those remedies are insufficient, and at the discretion of the Company, provide a refund. The Company’s warranty reserve, which is included in accrued expenses and other current liabilities in the condensed consolidated balance sheets, reflects estimated material, labor and other costs related to potential or actual software and hardware warranty claims for which the Company expects to incur an obligation. The Company’s estimates of anticipated rates of warranty claims and the costs associated therewith are primarily based on historical information and future forecasts. The Company periodically assesses the adequacy of the warranty reserve and adjusts the amount as necessary. If the historical data used to calculate the adequacy of the warranty reserve are not indicative of future requirements, additional or reduced warranty reserves may be required. The following table presents a summary of changes in the amount reserved for warranty costs for the six months ended June 30, 2023 and 2022: Six Months Ended June 30, 2023 2022 Warranty reserve at beginning of period $ 1,678 $ 2,392 Provisions 294 1,670 Charges ( 584 ) ( 931 ) Warranty reserve at end of period $ 1,388 $ 3,131

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value Measurements	7. Fair Value Measurements The following tables present information about the fair value of the Company’s financial assets and liabilities as of June 30, 2023 and December 31, 2022 and indicate the level of the fair value hierarchy utilized to determine such fair values: Fair Value Measurements as of June 30, 2023 Using: Level 1 Level 2 Level 3 Total Assets: Money market mutual funds $ 36,265 $ — $ — $ 36,265 $ 36,265 $ — $ — $ 36,265 Liabilities: Warrant liability $ — $ — $ 20,305 $ 20,305 Embedded derivatives — — 1,240 1,240 $ — $ — $ 21,545 $ 21,545 Fair Value Measurements as of December 31, 2022 Using: Level 1 Level 2 Level 3 Total Assets: Certificates of deposit—restricted cash $ — $ 1,013 $ — $ 1,013 Money market mutual funds 90,984 — — 90,984 $ 90,984 $ 1,013 $ — $ 91,997 During the six months ended June 30, 2023 and 2 0 22 , there were no transfers between Level 1, Level 2 and Level 3. Warrant Liability On June 15, 2023, in connection with the closing of the Superpriority Term Loans, as defined and discussed in Note 10, Debt , the Company issued certain penny warrants (the "Warrants"). The warrants are exercisable for a variable percentage of the Common Stock of the Company depending on how long the debt remains outstanding. Warrants representing the right to purchase an aggregate of 9,691 shares of the Company's common stock (the “10% Warrants”) were immediately vested as of the June 15, 2023 closing date. Warrants representing the right to purchase 4,846 shares of the Company's common stock (the “5% Warrants”) will vest on January 1, 2024 , if the debt remains outstanding. Warrants representing the right to purchase 4,836 shares of the Company's common stock (the “4.99% Warrants”) will vest on January 1, 2025 , if the debt remains outstanding. Due to the variable number of shares for which the warrants were exercisable, they failed to qualify for equity classification under the indexation guidance in ASC 815. Therefore, the Warrants are classified as liabilities at fair value on the condensed consolidated balance sheet. Each reporting period, the Warrants will be recorded at fair value, with changes in fair value recognized in the Company’s consolidated statement of operations within interest expense. Changes in the fair value of the warrant liability from June 15, 2023 to June 30, 2023 were immaterial. The Company’s liability for the Warrants is based on significant inputs not observable in the market, which represents a Level 3 measurement within the fair value hierarchy. The Company establishes the fair value for the Warrants using a Monte Carlo simulation model. The key inputs into the valuation models were as follows: Three Months Ended June 30, 2023 Risk-free interest rate 3.9 % Correlated random variable ( 0.3 ) Expected volatility - revenue 45.0 % Expected volatility - equity 90.0 % Vesting dates 6/15/2023 1/1/2024 1/1/2025 Simulated stock price $ 1.01 Embedded Derivatives Further, in connection with the Superpriority Credit Agreement, the Company identified certain embedded features requiring bifurcation as derivatives under ASC 815. These embedded derivatives are required to be bifurcated from the debt host contract at fair value with subsequent changes in fair value recognized in earnings at each balance sheet date (see Note 8). The fair value of the embedded derivatives is based on a Monte Carlo valuation model utilizing a with and without analysis of the embedded features within the debt facility. The Company ran a Monte Carlo simulation model with the embedded derivatives, and then ran a separate Monte Carlo simulation model for the overall debt facility, without the embedded derivative features. The difference between these two Monte Carlo simulation models was used to obtain the value of the embedded features. The key inputs into the valuation models for both the with and without were as follows: Three Months Ended June 30, 2023 Risk-free interest rate 3.9 % Correlated random variable ( 0.3 ) Expected volatility - revenue 45.0 % Expected volatility - equity 90.0 % Revenue discount rate 11.3 % Discount rate 17.0 % The Company’s liability for the embedded derivatives is based on significant inputs not observable in the market, which represents a Level 3 measurement within the fair value hierarchy. Changes in the fair value of the embedded derivatives from June 15, 2023 to June 30, 2023 were immaterial. Superiority Term Loans The Company initially recognized the Superpriority Term Loans at fair value in the application of extinguishment accounting (see Note 10, Debt ). The Company established the fair value for the debt facility, which is a nonrecurring fair value calculation, using a discounted-cash flow analysis, for which the initial fair value measurement on June 15, 2023 was $ 186,990 . Under the discounted-cash flow analysis, the Company discounts each principal and interest payment by an applicable discount rate determined by referencing the Company’s current public credit rating and seniority of the debt instrument in hand. The stream of principal and interest payments (discounted to present value) are used to calculate the fair value of the debt. The key inputs in valuing the debt and embedded derivatives include management projections (i.e., revenue, gross margin, operating expenses, R&D expenses, depreciation and amortization, and employee stock compensation), the Company’s cash balance, penalty amounts under an event of default (only applicable to the embedded derivatives), the forward SOFR curve, revenue volatility, revenue discount rate (derived using asset beta, metric volatility, asset volatility, risk-free rate, equity risk premium, small stock risk premium, company specific risk premium), and risk discount rate. The fair value of the Superiority Term Loans is classified within Level 3 of the fair value hierarchy. Other than the valuation techniques used for the warrant liability, embedded derivatives and Superiority Term Loans, there were no changes to the valuation techniques used to measure asset and liability fair values on a recurring basis during the six months ended June 30, 2023 from those included in the Company’s consolidated financial statements for the year ended December 31, 2022 .

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	8. Derivative Financial Instruments Fair value accounting requires bifurcation of embedded derivative instruments in debt or equity instruments and measurement of their fair value for accounting purposes. The Superpriority Term Loans, as defined and discussed in Note 10, Debt , include three embedded features; contingent interest upon an uncured event of default; mandatory prepayment upon certain excess cash flow; and mandatory prepayment upon an uncured event of default. Pursuant to ASC 815, these features have been identified as embedded derivative financial instruments. These embedded derivatives are required to be accounted for as derivatives and bifurcated from the debt host contract, resulting in remeasurement at each balance sheet date, with the change in fair value recognized in the Company’s condensed consolidated statement of operations. The total derivative liability related to these features as of June 30, 2023 was $ 1,240 and was included with accrued expenses and other current liabilities and other liabilities, net of current portion on the condensed consolidated balance sheet, as appropriate.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes	9. Income Taxes The Company’s effective income tax rate was ( 2.3 %) and 19.4 % for the three months ended June 30, 2023 and 2022 , respectively. The provision for (benefit from) income taxes was $ 1,160 and ($ 4,020 ) for the three months ended June 30, 2023 and 2022, respectively. The change in the provision for income taxes was primarily due to the period over period changes in the Company's valuation allowance against its deferred tax assets, the impact of changes in the Company's forecasted profitability and the jurisdictional mix of earnings. The Company’s effective income tax rate was ( 1.6 %) and ( 14.7 %) for the six months ended June 30, 2023 and 2022, respectively. The provision for income taxes was $ 1,308 and $ 6,332 for the six months ended June 30, 2023 and 2022, respectively. The change in the provision for income taxes was primarily due to the period over period changes in the Company's valuation allowance against its deferred tax assets, the impact of changes in the Company's forecasted profitability and the jurisdictional mix of earnings. The provision for income taxes for the three and six months ended June 30, 2023 and 2022 , respectively, differed from the federal statutory rate primarily due to the geographical mix of earnings and related foreign tax rate differential, permanent differences, research and development credits, foreign tax credits, and the valuation allowance maintained against the Company's deferred tax assets and withholding taxes.

Debt

Debt	6 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
Debt	10. Debt Current debt obligations reflected in the condensed consolidated balance sheets as of June 30, 2023 and December 31, 2022 consisted of the following: June 30, December 31, 2023 2022 Current liabilities: Original Term Loans $ 5,036 $ 226,009 Superpriority Term Loans 1,870 — Current portion of long-term debt 6,906 226,009 Unamortized debt issuance costs, current portion ( 557 ) ( 848 ) Current portion of long-term debt, net of unamortized debt issuance costs $ 6,349 $ 225,161 Non-current liabilities: Superpriority Term Loans $ 185,841 $ — Unamortized debt issuance costs, net of current portion ( 13,923 ) — Long-term debt, net of current portion and unamortized debt issuance costs $ 171,918 $ — As of June 30, 2023, aggregate minimum future principal payments of the Company's debt are summarized as follows: Year Ending December 31, Remainder of 2023 $ 5,973 2024 1,861 2025 1,842 2026 1,824 2027 181,247 $ 192,747 On December 20, 2016, the Company entered into a credit agreement (the "Original Credit Agreement") with JPMorgan Chase Bank, N.A., as administrative agent, various lenders, JPMorgan Chase Bank, N.A. and Barclays Bank PLC providing for (i) a term loan facility of $ 300,000 (the “Original Term Loans”), due to mature on December 20, 2023 , and (ii) a revolving credit facility (the "Original Revolving Loan") of up to $ 25,000 in revolving credit loans and letters of credit, which matured on December 20, 2021 . On June 15, 2023 (the “Effective Date”), the Borrower and certain of the Lenders entered into various agreements to effectively exchange $ 218,848 of the Original Term Loans, representing approximately 97.8 % of the then outstanding principal balance, for loans of an equal principal amount having a first priority security interest in all or substantially all of the Company's and its domestic subsidiaries' assets, subject to permitted liens (the “Superpriority Credit Agreement” or “Superpriority Term Loans”), whereby the maturity date would be extended to December 20, 2027 in exchange for the Company paying down $ 40,000 of its exchanged Original Term Loans (as part of an early principal repayment), providing certain Warrants to the Lenders and paying certain in-kind fees, amongst other changes (the “Exchange”), and with $ 5,036 of the Original Term Loans principal remaining outstanding and still due to mature on December 20, 2023 . The Exchange was deemed to be an exchange of debt with substantially different terms under ASC Subtopic 470-50, “Modifications and Extinguishments,” and the Company recorded a loss on extinguishment of debt of approximately $ 28,956 in the condensed consolidated statement of operations for the three months ended June 30, 2023. In applying extinguishment accounting, the Company recorded the Superpriority Term Loans at fair value. Therefore, the current carrying value of the loans approximates fair value as of June 30, 2023. The Superpriority Term Loans bear interest at the Adjusted Term SOFR Rate (as defined in the Superpriority Credit Agreement) (subject to a 2.00 % per annum floor) or Base Rate (as defined in the Superpriority Credit Agreement), as applicable, plus (x) in the case of SOFR Rate Loans (as defined in the Superpriority Credit Agreement), 6.50 % per annum or (y) in the case of Base Rate Loans (as defined in the Superpriority Credit Agreement), 5.50 % per annum, provided that, the foregoing interest rate margin in respect of both SOFR Rate Loans and Base Rate Loans shall be increased (i) by 0.50 % per annum on July 1, 2024 and (ii) by 1.00 % per annum on and after January 1, 2025 (for a total increase of 1.50 % per annum), if, in each case, the outstanding amount of Superpriority Term Loans on such date is in excess of $ 125,000 (with continuing effect from such date regardless of the outstanding amount of Superpriority Term Loans at any time after such date of determination); and any time after June 30, 2025, with respect to Superpriority Term Loans (x) in the case of SOFR Rate Loans, 13.00 % per annum or (y) in the case of Base Rate Loans, 12.00 % per annum. As of June 30, 2023 , the interest rate on the Superpriority Term Loans was 12.22 % per annum. The Superpriority Term Loans are prepayable at par between the closing of the Superpriority Credit Agreement through December 31, 2023; thereafter, the Superpriority Term Loans are prepayable at any time and from time to time, subject to an exit fee increasing over time ranging from 3.0 % to 20.0 % through maturity. In the event the Superpriority Term Loans are accelerated prior to their maturity following any event of default, the maximum exit fee will be payable in connection therewith. The Superpriority Term Loans are expected to mature on December 20, 2027 (subject to a springing maturity of December 20, 2025 if, unless otherwise waived by holders collectively owning or controlling at least 75 % of the Superpriority Term Loans on the date of determination, (x)(1) the Total Net First Lien Leverage Ratio (as defined in the Superpriority Credit Agreement) is greater than 1.00 :1.00, or (2) the Total Net Leverage Ratio (as defined in the Superpriority Credit Agreement) is greater than 1.50 :1.00, in each case, as of September 30, 2025, or (y) a Default (as defined in the Superpriority Credit Agreement) or Event of Default (as defined in the Superpriority Credit Agreement) has occurred and is continuing under the Superpriority Credit Agreement as of December 20, 2025), unless earlier repaid or accelerated. The Superpriority Term Loans will amortize in equal quarterly installments, resulting in an aggregate annual amount equal to 1.0 % of the principal amount of the Superpriority Term Loans outstanding on the date of the Term Loan Exchange (after giving effect to the Closing Date Prepayment). The Superpriority Term Loans are subject to mandatory prepayments, including 75 % of Excess Cash Flow, as defined by the Superpriority Credit Agreement, and the proceeds from certain non-ordinary course asset dispositions, the issuance of certain equity interests by Casa and the incurrence of certain indebtedness by Casa and its subsidiaries. Such prepayments shall be subject to the exit fee described above (to the extent otherwise then applicable). The Superpriority Credit Agreement also allows for the Company to retain up to $ 25,000 of proceeds from issuances of equity or subordinated debt, once the principal balance of the Superpriority Term Loans has been paid down by $ 20,000 . The Superpriority Credit Agreement contains customary representations and warranties, conditions, affirmative and negative covenants, liquidity-based financial covenants, events of default, and indemnification obligations. As of June 30, 2023, the Company was in compliance with the terms of the Superpriority Credit Agreement. As a result of the Exchange, $ 5,036 principal remains outstanding under the Original Term Loans. As a result of the Exchange, the Company, certain lenders party to the Original Credit Agreement and JPMorgan Chase Bank, N.A., as agent, entered into Amendment No. 1 thereto (“Amendment No. 1”) which, among other things, permitted the transaction contemplated by the Exchange and eliminated all mandatory prepayments (other than at maturity) and representations and warranties and most affirmative and negative covenants and events of default previously applicable to the Original Term Loans. The interest rates applicable to the Original Term Loans remain unchanged. Borrowings under the Original Term Loans bear interest at a floating rate, which could be either a synthetic Eurodollar rate plus an applicable margin or, at the Company’s option, a base rate (defined as the highest of (x) the JPMorgan Chase Bank, N.A. prime rate, (y) the federal funds effective rate, plus one-half percent ( 0.50 %) per annum and (z) a one-month Eurodollar rate plus 1.00 % per annum) plus an applicable margin. The applicable margin for borrowings under the Original Term Loans is 4.00 % per annum for Eurodollar rate loans (subject to a 1.00 % per annum interest rate floor) and 3.00 % per annum for base rate loans. The interest rate payable under the Original Term Loans is subject to an increase of 2.00 % per annum during the continuance of any payment default. For Eurodollar rate loans, the Company may select interest periods of one, three or six months or, with the consent of all relevant affected lenders, twelve months. Interest is payable at the end of the selected interest period, but no less frequently than every three months within the selected interest period. Interest on any base rate loan is not set for any specified period and is payable quarterly. The Company has the right to convert Eurodollar rate loans into base rate loans and the right to convert base rate loans into Eurodollar rate loans at its option, subject, in the case of Eurodollar rate loans, to breakage costs if the conversion was effected prior to the end of the applicable interest period. As of June 30, 2023 and December 31, 2022 , the interest rate on the Original Term Loans was 9.65 % and 8.38 % per annum, respectively, which was based on a three-month and one-month Eurodollar rate of 5.65 % and 4.38 % per annum plus the applicable margin of 4.00 % per annum for Eurodollar rate loans. Upon entering into the Original Term Loans, the Company incurred debt issuance costs of $ 7,811 , which were initially recorded as a reduction of the debt liability and were amortized to interest expense using the effective interest method from the issuance date of the Original Term Loans until the Effective Date. Upon entering into the Superpriority Term Loan, the remaining $ 509 of debt issuance costs from the Original Term Loans was included in the loss on extinguishment of debt in the condensed consolidated statement of operations. The Company also incurred additional debt issuance costs of $ 13,279 upon entering into the Superpriority Term Loan, which were recorded as a reduction of the debt liability and will be amortized to interest expense using the effective interest method from the issuance date of the Superpriority Term Loan until the maturity date. The Company made principal payments of $ 40,751 and $ 1,500 during the six months ended June 30, 2023 and 2022 , respectively, in addition to the repurchase as discussed below. Interest expense, including the amortization of debt issuance costs, totaled $ 6,046 and $ 3,797 for the three months ended June 30, 2023 and 2022 , respectively, and totaled $ 10,955 and $ 7,574 for the six months ended June 30, 2023 and 2022, respectively. On October 27, 2022, the Company's board of directors authorized the use of up to $ 50,000 of cash to fund the partial repurchase of debt outstanding under the Original Term Loans. Subsequent to this authorization and prior to the Superiority Term Loan refinancing on June 15, 2023, the Company repurchased a portion of its outstanding Original Term Loans from certain of its debt holders. During the six months ended June 30, 2023 but prior to the June 15, 2023 refinancing, the Company made a payment of $ 1,237 to retire $ 1,375 of its outstanding debt. The Company recognized a gain on extinguishment of debt, net of fees, of $ 133 , and also recognized $ 4 of interest expense for the pro-rata portion of unamortized debt issuance costs attributed to the debt repurchased. Total payments made under this authorization from October 27, 2022 through June 30, 2023 amounted to $ 47,116 , which were paid using funds included in cash and cash equivalents in the condensed consolidated balance sheets. Based on the applicable fair value of debt repurchased, the amount of outstanding principal of the Original Term Loans that was retired was $ 50,591 . The Original Term Loans, with a remaining principal balance of $ 5,036 as of June 30, 2023 , are scheduled to mature on December 20, 2023 and is subject to amortization in equal quarterly installments, which commenced on March 31, 2017, in an annual aggregate amount equal to 1.0 % of the original principal amount of the Original Term Loans of $ 300,000 , with any remaining outstanding balance payable at the original date of maturity on December 20, 2023. Voluntary prepayments of principal amounts outstanding under the Original Term Loans are permitted at any time; however, if a prepayment of principal is made with respect to a Eurodollar loan on a date other than the last day of the applicable interest period, the Company is required to compensate the lenders thereunder for any funding losses and expenses incurred as a result of the prepayment. The Original Term Loans, which are now subordinated to the Superpriority Term Loans, is secured by, among other things, a second priority security interest, subject to permitted liens, in substantially all of the Company’s assets and a pledge of certain of the stock of certain of its subsidiaries, in each case subject to specified exceptions. The Company was in compliance with all the terms of the Original Credit Agreement June 30, 2023 and December 31, 2022 .

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2023
Equity [Abstract]
Stockholders' Equity	11. Stockholders’ Equity Stock Repurchase Program On February 21, 2019, the Company announced a stock repurchase program authorizing it to repurchase up to $ 75,000 of the Company’s common stock. The Company repurchased 204 shares, at a cost of $ 1,192 , including commissions, during six months ended June 30, 2022 . There were no repurchases made during the three and six months ended June 30, 2023 and during the three months ended June 30, 2022. As of June 30, 2023 , $ 60,234 remained authorized for repurchases of the Company’s common stock under the stock repurchase program. However, b ased on the Company's net leverage ratio at June 30, 2023, as described in Note 10, Debt , the Company's ability to repurchase shares is currently restricted. The stock repurchase program has no expiration date and does not require the Company to purchase a minimum number of shares, and the Company may suspend, modify or discontinue the stock repurchase program at any time without prior notice. Securities Purchase Agreement with Verizon Ventures LLC On April 18, 2022, the Company entered into a Securities Purchase Agreement (the “SPA”) with Verizon Ventures LLC providing for the private placement of an aggregate of 9,323 shares (the “Shares”) of the Company's common stock, par value $ 0.001 per share at a price of $ 4.24 per share, for an aggregate purchase price of approximately $ 39,530 . Issuance costs related to this transaction totaled $ 160 and were net against the amount recorded to additional paid in capital on the condensed consolidated balance sheet. The Company filed a resale registration statement for the Shares with the SEC on May 17, 2022.

Stock-based Compensation

Stock-based Compensation	6 Months Ended
	Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]
Stock-based Compensation	12. Stock-based Compensation 2017 Stock Incentive Plan The Company’s 2017 Stock Incentive Plan (the “2017 Plan”) provides for the Company to sell or issue common stock or restricted common stock, or to grant qualified incentive stock options, nonqualified stock options, SARs, performance-based restricted stock units (“PSUs”), RSUs or other stock-based awards to the Company’s employees, officers, directors, advisors and outside consultants. The total number of shares authorized for issuance under the 2017 Plan was 17,007 shares as of June 30, 2023 , of which 3,606 shares remained available for future grant. Stock Options A summary of stock option activity for the six months ended June 30, 2023 is as follows: Number Weighted- Weighted- Aggregate (in years) Outstanding at January 1, 2023 6,537 $ 7.55 4.42 $ 134 Granted 29 1.15 Exercised ( 1 ) 2.23 Forfeited ( 301 ) 6.23 Outstanding at June 30, 2023 6,264 $ 7.59 3.95 $ 3 Options exercisable at June 30, 2023 5,302 $ 8.25 3.08 $ — Vested or expected to vest at June 30, 2023 6,215 $ 7.62 3.91 $ 3 The fair value of each option is estimated on the date of grant using the Black-Scholes option-pricing model using the following assumptions: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Risk-free interest rate 3.9 % 3.0 %– 3.2 % 3.5 %– 3.9 % 1.7 – 3.2 % Expected term (in years) 6.1 5.6 – 6.3 6.1 5.6 – 6.3 Expected volatility 44.75 % 40.5 – 41.5 % 44.3 %– 44.8 % 38.5 – 41.5 % Expected dividend yield 0.0 % 0.0 % 0.0 % 0.0 % The weighted-average grant-date fair value of options granted during the six months ended June 30, 2023 and 2022 was $ 0.48 and $ 1.62 per share, respectively. Cash proceeds received upon the exercise of options were $ 2 and $ 255 during the six months ended June 30, 2023 and 2022, respectively. The intrinsic value of stock options exercised during the six months ended June 30, 2023 and 2022 was $ 1 and $ 299 , respectively. The aggregate intrinsic value is calculated as the difference between the exercise price of the stock options and the fair value of the Company’s common stock for those stock options that had exercise prices lower than the fair value of the Company’s common stock. Restricted Stock Units A summary of RSU activity for the six months ended June 30, 2023 is as follows: Number of Weighted- Aggregate Unvested balance at January 1, 2023 5,505 $ 4.49 Granted 4,324 1.02 Vested ( 2,531 ) 4.04 $ 6,132 Forfeited ( 185 ) 5.14 Unvested balance at June 30, 2023 7,113 $ 2.46 The Company withheld 1,422 and 355 shares of common stock in settlement of employee tax withholding obligations due upon the vesting of RSUs and PSUs during the six months ended June 30, 2023 and 2022, respectively. Performance-Based Stock Units During the six months ended June 30, 2022 , the Company granted PSUs to certain employees that vest over a three-year period based on the achievement of performance goals and continued performance of services. All PSUs granted prior to the six months ended June 30, 2022, and a portion of PSUs granted during the three months ended June 30, 2022 , consist solely of market-based vesting conditions, determined by the Company’s level of achievement of pre-established parameters relating to the performance of the Company’s stock price as set by the board of directors. Vesting for these market-based PSUs may occur at any time during the three-year period. The remaining portion of PSUs granted during the three months ended June 30, 2022 consisted of performance-based vesting conditions determined by the Company's achievement of performance targets with respect to a certain customer agreement. Vesting of these performance-based PSUs occurred during the three months ended June 30, 2023 pursuant to Jerry Guo's retirement as discussed below. No PSUs were granted during the six months ended June 30, 2023. A summary of PSU activity for the six months ended June 30, 2023 is as follows: Number of Weighted- Aggregate Unvested balance at January 1, 2023 1,262 $ 4.15 Granted — — Vested ( 1,238 ) 3.48 $ 2,102 Forfeited — — Unvested balance at June 30, 2023 24 $ 7.89 Compensation expense is based on the estimated value of the awards on the grant date, and is recognized over the period from the grant date through the expected vest dates of each vesting condition, both of which were estimated based on a Monte Carlo simulation model applying the following key assumptions: Three and six months ended June 30, 2022 Risk-free interest rate 2.8 % Volatility 79.1 % Dividend yield 0.0 % Cost of equity 13.2 % Stock Appreciation Rights Over time, the Company has granted SARs that allow the holder the right, upon exercise, to receive in cash the amount of the difference between the fair value of the Company’s common stock at the date of exercise and the price of the underlying common stock at the date of grant of each SAR. The SARs vested over a four-year period from the date of grant and expire ten years from the date of grant. There was no SAR liability as of June 30, 2023 or December 31, 2022 , as the exercise price of all outstanding SARs exceeded the fair value of the Company's common stock as of each applicable date. There were no grants, exercises or forfeitures during the six-month period ending June 30, 2023. Stock-Based Compensation Expense Stock-based compensation expense related to stock options, RSUs, SARs and PSUs for the three and six months ended June 30, 2023 and 2022 was classified in the condensed consolidated statements of operations and comprehensive loss as follows: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Cost of revenue $ 11 $ 26 $ 37 $ 61 Research and development expenses 552 694 1,252 1,289 Selling, general and administrative expenses 1,245 2,159 4,641 4,157 Total stock-based compensation $ 1,808 $ 2,879 $ 5,930 $ 5,507 The Company recognized stock-based compensation expense for the three and six months ended June 30, 2023 and 2022 in the condensed consolidated balance sheet as follows: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Change in fair value of SAR Liability $ — $ ( 56 ) $ — $ ( 159 ) Recognized as additional paid-in capital 1,808 2,935 5,930 5,666 Total stock-based compensation $ 1,808 $ 2,879 $ 5,930 $ 5,507 As of June 30, 2023 , there was $ 15,989 of unrecognized compensation cost related to outstanding stock options, RSUs, SARs and PSUs, which is expected to be recognized over a weighted-average period of 2.18 years. Retirement of Jerry Guo On March 14, 2023, Jerry Guo, the Company’s co-founder, President and Chief Executive Officer, announced his retirement from his executive roles effective March 17, 2023. A separation agreement was entered into by Mr. Guo and the Company’s board of directors on March 13, 2023. Pursuant to this agreement, Mr. Guo was entitled to certain termination benefits, including the acceleration of vesting of all unvested stock-based awards upon his termination. This resulted in the accelerated vesting and release of 551 RSUs and 883 PSUs during the six months ended June 30, 2023. Incremental stock-based compensation recognized in selling, general and administrative expense on the condensed consolidated statement of comprehensive loss for the six months ended June 30, 2023 was $ 1,737 .

Net Loss per Share

Net Loss per Share	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Net Loss per Share	13. Net Loss per Share The following potential common shares were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because including them would have been anti-dilutive: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Options to purchase common stock 6,264 7,110 6,264 7,110 Unvested restricted stock units 7,113 5,108 7,113 5,108 Unvested performance-based stock units 24 1,262 24 1,262

Revenue from Contracts with Cus

Revenue from Contracts with Customers	6 Months Ended
	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	14. Revenue from Contracts with Customers Disaggregation of revenue The Company disaggregates its revenue by product and service in the condensed consolidated statements of operations and comprehensive loss. Performance obligations related to product revenue are recognized at a point in time, while performance obligations related to service revenue are recognized over time. The Company also disaggregates its revenue based on geographic locations of its customers, as determined by the customer’s shipping address, summarized as follows: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 North America: United States $ 15,345 $ 22,697 $ 32,571 $ 36,232 Canada 11,773 9,340 15,557 25,099 Total North America 27,118 32,037 48,128 61,331 Europe, Middle East and Africa: 5,520 4,886 11,428 11,166 Asia-Pacific: Australia 13,079 20,774 25,841 37,292 Other 5,842 7,411 9,646 15,591 Total Asia-Pacific 18,921 28,185 35,487 52,883 Latin America 6,444 5,728 8,257 9,855 Total revenue (1) $ 58,003 $ 70,836 $ 103,300 $ 135,235 (1) Other than the United States, Canada and Australia, no individual countries represented 10 % or more of the Company’s total revenue for any of the periods presented. The Company also disaggregates its revenue based on product lines as determined by the technical characteristics of the product. As telecommunication technologies, and the market for them evolves, the categorization of our products is subject to shifts that management monitors and reevaluates as necessary. Accordingly, beginning with the three months ended March 31, 2023, the Company updated its product line reporting. Revenue amounts for the three and six months ended June 30, 2022 have been reclassified to conform with 2023 reporting. Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Product revenue: Access devices $ 26,984 $ 35,005 $ 51,892 $ 66,753 Cable 18,727 16,102 25,645 35,875 Cloud 276 8,034 3,699 9,058 Total product revenue 45,987 59,141 81,236 111,686 Service revenue: Access devices $ 1,233 $ 1,869 2,079 3,630 Cable 8,766 9,097 17,182 17,953 Cloud 2,017 729 2,803 1,966 Total service revenue 12,016 11,695 22,064 23,549 Total revenue $ 58,003 $ 70,836 $ 103,300 $ 135,235 Contract Balances Contract liabilities consist of deferred revenue and include payments received in advance of performance under the contract. Such amounts are recognized as revenue when the Company satisfies its performance obligations, consistent with the Company's revenue recognition policy. During the three and six months ended June 30, 2023 , the Company recognized revenue of $ 3,368 and $ 10,605 , respectively, that was included in deferred revenue in the condensed consolidated balance sheet as of December 31, 2022. During the three and six months ended June 30, 2022 , the Company recognized revenue of $ 2,855 and $ 8,491 , respectively, that was included in deferred revenue in the condensed consolidated balance sheet as of December 31, 2021. The Company receives payments from customers based upon contractual billing terms. Accounts receivable are recorded when the right to consideration becomes unconditional. Contract assets include amounts related to the Company’s contractual right to consideration for both completed and partially completed performance obligations that may not have been invoiced. As of June 30, 2023 and December 31, 2022 , the Company included contract assets of $ 3,533 and $ 2,674 , respectively, in accounts receivable, net in the condensed consolidated balance sheets. Transaction Price Allocated to the Remaining Performance Obligations As of June 30, 2023 , the aggregate remaining amount of revenue expected to be recognized related to unsatisfied or partially unsatisfied performance obligations was $ 58,197 , which consisted of deferred revenue. The Company expects approximately 92 % of this amount to be recognized in the next twelve months with the remaining amount to be recognized over the next two to five years .

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2023
Segment Reporting [Abstract]
Segment Information	15. Segment Information The Company operates as one operating segment. Operating segments are defined as components of an enterprise for which separate financial information is regularly evaluated by the Company’s chief operating decision maker, or decision-making group, in deciding how to allocate resources and assess performance. The Company has determined that its chief operating decision maker is its Chief Executive Officer. The Company’s chief operating decision maker reviews the Company’s financial information on a consolidated basis for purposes of allocating resources and assessing financial performance. Since the Company operates as one operating segment, all required financial segment information can be found in these condensed consolidated financial statements. The Company’s property and equipment, net by location was as follows: June 30, December 31, U.S. $ 13,663 $ 14,679 China 2,666 3,017 Australia 665 1,054 Other 607 768 Total property and equipment, net $ 17,601 $ 19,518

Related Parties

Related Parties	6 Months Ended
	Jun. 30, 2023
Related Party Transactions [Abstract]
Related Parties	16. Related Parties Employment of Rongke Xie Rongke Xie, who serves as General Manager of Guangzhou Casa Communication Technology LTD (“Casa China”), a subsidiary of the Company, is the sister of Lucy Xie, who served as the Company’s Senior Vice President of Operations until her retirement on December 31, 2022, and remains serving as a member of the Company’s board of directors. Rongke Xie is also the sister-in-law of Jerry Guo, who served as the Company's President and Chief Executive Officer until his retirement on March 17, 2023, and remains serving as a member of the Company's board of directors. Casa China paid Rongke Xie $ 123 and $ 144 in total compensation during the six months ended June 30, 2023 and 2022, respectively, for her services as an employee. To date, the Company has granted to Rongke Xie 145 RSUs, which vest over four-year periods. The grant-date fair value of the awards totaled $ 600 , which is recorded as stock-based compensation expense over the vesting period of the awards. During the three months ended June 30, 2023 and 2022 , the Company recognized selling, general and administrative expenses of $ 24 and $ 30 related to these awards. During the six months ended June 30, 2023 and 2022 , the Company recognized selling, general and administrative expenses of $ 52 and $ 61 related to these awards. Transactions Involving Verizon Communications Inc. and its Affiliates As a result of the Company's SPA with Verizon Ventures LLC on April 18, 2022 (see Note 11, Stockholders Equity ), Verizon Communications Inc. and its subsidiaries (“Verizon and Affiliates”) collectively became a principal stockholder of the Company through its ownership of common stock. Verizon and Affiliates are customers of the Company. During the three and six months ended June 30, 2023 , the Company recognized revenue of $ 4,287 and $ 7,284 , respectively, from transactions with Verizon and Affiliates, and amounts received in cash resulting from revenue transactions with Verizon and Affiliates during the six months ended June 30, 2023 totaled $ 26,110 . During the three and six months ended June 30, 2022 , the Company recognized revenue of $ 10,550 from transactions with Verizon and Affiliates during which a related party relationship existed, and amounts received in cash resulting from revenue transactions with Verizon and Affiliates during the six months ended June 30, 2022 totaled $ 1,201 . As of June 30, 2023 and December 31, 2022 , amounts due from Verizon and Affiliates totaled $ 3,635 and $ 6,044 , respectively, and were included in accounts receivable, net in the condensed consolidated balance sheet. As of June 30, 2023 and December 31, 2022 , revenue from transactions that did not meet the criteria for recognition totaling $ 33,913 and $ 18,094 , respectively, with Verizon and Affiliates were included in deferred revenue in the condensed consolidated balance sheet.

Leases

Leases	6 Months Ended
	Jun. 30, 2023
Leases [Abstract]
Leases	17. Leases The Company leases manufacturing, warehouse and office space in the United States, Ireland, China, Hong Kong, Spain and Australia under non-cancelable operating leases with expiration dates through 2028 , as well as various equipment leases. The leases have remaining lease terms of 1 year to 6 years , some of which contain options to extend the leases for up to 3 additional years and some which include options to terminate the leases within 1 year . The lease agreements contain lease and non-lease components, which are generally accounted for together. After the adoption of ASC 842, the Company determines if an arrangement is a lease at inception. Operating leases are included in the operating lease right-of-use, (“ROU”), assets and the short-term and long-term lease liabilities on the consolidated balance sheets. ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company's obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of the leases do not provide an implicit rate, the Company used its incremental borrowing rate based on information available at commencement date in determining the present value of lease payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives. Lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. Pursuant to the terms of the lease agreement for the Company’s Australia office, the Company obtained six standby letters of credit in the amount of approximately $ 625 and $ 2,100 as security on the lease obligation, as of June 30, 2023 and December 31, 2022, respectively. The letters of credit are classified as restricted cash in the accompanying condensed consolidated balance sheets as of June 30, 2023 and December 31, 2022. The components of lease expense were as follows: Three Months Ended Six Months Ended June 30, 2023 June 30, 2023 Financing lease cost $ — $ — Operating lease cost 551 1,106 Short-term lease cost 1 2 Variable lease cost 73 128 Total lease cost $ 625 $ 1,236 Supplemental cash flow information related to leases was as follows: Six Months Ended June 30, 2023 Cash paid for operating leases included in cash flows from operating activities $ 1,055 Right-of-use assets obtained in exchange for new operating leases 55 Supplemental balance sheet information related to leases was as follows: Six Months Ended Year Ended June 30, 2023 December 31, 2022 Weighted average remaining lease term for operating leases 3.32 years 3.58 years Weighted average discount rate for operating leases 4.1 % 4.0 % Maturities of operating lease liabilities were as follows: Year Ending December 31, 2023 $ 1,110 2024 1,319 2025 948 2026 841 2027 565 Thereafter 2 Total future minimum lease payments $ 4,785 Less: amounts representing interest ( 329 ) Total lease liabilities 4,456 Less: current operating lease liability ( 1,715 ) Long term operating lease liability 2,741

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	18. Commitments and Contingencies Indemnification The Company has, in the ordinary course of business, agreed to defend and indemnify certain customers and partners against third-party claims asserting (i) infringement of certain intellectual property rights, which may include patents, copyrights, trademarks or trade secrets, and (ii) certain other harms caused by the acts or omissions of the Company. As permitted under Delaware law, the Company indemnifies its officers, directors and employees for certain events or occurrences that happen by reason of their relationship with or position held at the Company. As of June 30, 2023 and December 31, 2022 the Company accrued $ 500 and $ 1,487 , respectively, as a minimum estimated liability related to ongoing indemnification claims. As of June 30, 2023 and December 31, 2022, no additional material claims were outstanding where a contingent loss was considered to be probable or reasonably estimable. The Company does not expect additional significant claims related to these indemnification obligations and, consequently, concluded that the fair value of any additional obligations is negligible. Litigation From time to time, the Company is a party to various litigation matters and subject to claims that arise in the ordinary course of business including, for example, patent infringement lawsuits by non-practicing entities. In addition, third parties may from time to time assert claims against the Company in the form of letters and other communications. The Company is not presently subject to any pending or threatened litigation that it believes, if determined adversely to the Company, individually, or taken together, would reasonably be expected to have a material adverse effect on its business or financial results. Other As described in Note 6, Accrued Expenses and Other Current Liabilities , the Company provides industry-standard product warranties to its customers and is thus inherently subject to loss contingencies that include warranty claims which may arise in the ordinary course of business. On July 21, 2022, the Company received written notification from a significant customer of one of its international subsidiaries, of alleged costs incurred and expected to be incurred by that customer with respect to an ongoing warranty matter relating to field replacements of failed units for one particular product, which failure was attributable to an unauthorized part substitution in 2019 by a supplier to the subsidiary. On December 23, 2022, the Company executed a settlement deed with the customer, whereby the Company agreed to, among other things, a settlement amount of 20,000 Australian dollars, to be paid in four equal annual installments , the first of which was paid upon execution of the settlement deed in the amount of 5,000 Australian dollars, or $ 3,398 . As of June 30, 2023 , the remaining accrued expense balance, representing the estimated net present value of the remaining payments, plus the estimated cost of other non-monetary obligations under the settlement deed was $ 9,570 , as shown in Note 6, Accrued Expenses and Other Current Liabilities .

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2023
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Significant estimates and judgments relied upon by management in preparing these condensed consolidated financial statements include revenue recognition, reserves for excess and obsolete inventory, valuation of inventory and deferred inventory costs, the expensing and capitalization of software-related research and development costs, amortization and depreciation periods, the recoverability of net deferred tax assets, valuations of uncertain tax positions, warranty allowances, the valuation of equity instruments, warrants and embedded derivatives, and stock-based compensation expense. Although the Company regularly reassesses the assumptions underlying these estimates, actual results could differ materially from these estimates. Changes in estimates are recorded in the period in which they become known. The Company bases its estimates on historical experience and various other assumptions that it believes to be reasonable under the circumstances existing at the time such estimates are made. The COVID-19 pandemic disrupted the Company's global supply chain. Throughout 2022 and 2021, the Company experienced shipping bottlenecks and shortages of supply that resulted in its inability to fulfill certain customer orders within normal lead times. This adversely impacted the Company's revenue and operating results for the years ended December 31, 2022 and 2021. The Company also experienced, in some cases, significant increases in shipping costs. While the impact to the Company has subsided during 2023, the Company continues to work with its supply chain, contract manufacturers, logistics partners and customers to minimize the extent of such impacts and will continue to actively monitor supply chain developments. The Company cannot predict if or when such effects will recur or worsen, and in such a case, could prevent the Company from being able to fulfill its customers' orders in a timely manner or at all, which could lead to one or more of its customers canceling their orders. The Company would be neither able to estimate the extent of these impacts nor predict whether its efforts to minimize or contain them will be successful. In addition, the regions in which the Company operates have experienced a significant increase in inflation, which has adversely impacted the cost to manufacture the Company's products with limited ability to pass such increases on to its customers under previously established fixed price agreements. Inflation has further resulted in increased operating costs and interest rate increases, which will result in increased debt service costs. If interest rates continue to rise, the Company anticipates further adverse effects from inflation and increased interest rates. At this time, the Company is neither able to estimate the extent of these impacts nor predict whether its efforts to minimize or contain them will be successful. The Company will continue to monitor its business very closely for any effects of COVID-19, inflation and interest rate increases for as long as necessary.
Subsequent Event Considerations	Subsequent Event Considerations The Company considers events or transactions that occur after the balance sheet date but prior to the issuance of the financial statements to provide additional evidence for certain estimates or to identify matters that require additional disclosure. Subsequent events have been evaluated as required. The Company has evaluated all subsequent events and determined that there are no additional material recognized or unrecognized subsequent events requiring disclosure in these condensed consolidated financial statements.
Cash, Cash Equivalents and Restricted Cash	Cash, Cash Equivalents and Restricted Cash Cash and cash equivalents include all highly liquid investments maturing within three months from the date of purchase. As of June 30, 2023 and December 31, 2022, the Company’s cash and cash equivalents consisted of investments in money market mutual funds. Restricted cash as of June 30, 2023 consisted of cash of $ 1,000 pledged as collateral for a stand-by letter of credit required to support a contractual obligation and cash of $ 625 pledged as collateral in connection with two letters of credit to support contractual obligations, as further discussed in Note 17, Leases . As of December 31, 2022 , restricted cash consisted of a certificate of deposit of $ 1,013 , pledged as collateral for a stand-by letter of credit required to support a contractual obligation, as well as cash of $ 2,100 , pledged as collateral in connection with two letters of credit to support contractual obligations, as further discussed in Note 17, Leases . The following table is a reconciliation of cash, cash equivalents and restricted cash included in the accompanying condensed consolidated balance sheets that sum to the total cash, cash equivalents and restricted cash included in the accompanying condensed consolidated statements of cash flows: June 30, 2023 June 30, 2022 Cash and cash equivalents $ 64,265 $ 195,832 Restricted cash included in other assets 1,625 3,104 $ 65,890 $ 198,936
Accounts Receivable	Accounts Receivable Accounts receivable are presented net of a provision for doubtful accounts, which is an estimate of amounts that may not be collectible. Accounts receivable for customer contracts with customary payment terms, which are one year or less, are recorded at invoiced amounts and do not bear interest. The Company may, in limited circumstances, grant payment terms longer than one year. Payments due beyond 12 months from the balance sheet date are recorded as non-current assets. The Company generally does not require collateral, but the Company may, in certain instances based on its credit assessment, require full or partial prepayment prior to shipment. Accounts receivable as of June 30, 2023 and December 31, 2022 consisted of the following: June 30, December 31, Current portion of accounts receivable, net: Accounts receivable, net $ 47,400 $ 74,407 Accounts receivable, extended payment terms — 77 $ 47,400 $ 74,484 The Company performs ongoing credit evaluations of its customers and, if necessary, provides a provision for doubtful accounts and expected losses. When assessing and recording its provision for doubtful accounts, the Company evaluates the age of its accounts receivable, current economic trends, creditworthiness of the customer, customer payment history, and other specific customer and transaction information. The Company also provides an overall expected credit loss amount, based on historical loss rates, in accordance with ASC 326, Credit Losses . The Company writes off accounts receivable against the provision when it determines a balance is uncollectible and no longer actively pursues collection of the receivable. Adjustments to the provision for doubtful accounts are recorded as selling, general and administrative expenses in the condensed consolidated statements of operations and comprehensive loss. As of June 30, 2023 and December 31, 2022 , the Company concluded that all amounts due under extended payment terms were collectible and recorded no reserve for credit losses. During the six months ended June 30, 2023 and 2022 , the Company did no t provide a reserve for credit losses and did no t write off any uncollectible receivables due under extended payment terms. The Company has entered into a customer-sponsored program administered by an unrelated financial institution that allows for the sales (factor) of certain accounts receivable at discounted rates to the financial institution, without recourse. Transactions under this agreement were accounted for as a sale of accounts receivable and the related accounts receivable were removed from our condensed consolidated balance sheet at the time of the sales transaction. Under this agreement, we sold $ 20,773 of accounts receivables during the three and six months ended June 30, 2023 . Selling, general and administrative expenses include factoring costs associated with this accounts receivable sale program of $ 198 during the three and six months ended June 30, 2023 .
Concentration of Risks	Concentration of Risks Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash and cash equivalents and accounts receivable. Cash and cash equivalents consist of demand deposits, savings accounts, money market mutual funds, and certificates of deposit with financial institutions, which may exceed Federal Deposit Insurance Corporation limits. The Company has not experienced any losses related to its cash and cash equivalents and does not believe that it is subject to unusual credit risk beyond the normal credit risk associated with commercial banking relationships. The Company grants credit to customers in the ordinary course of business. Credit evaluations are performed on an ongoing basis to reduce credit risk, and no collateral is required from the Company’s customers. An allowance for uncollectible accounts is provided for those accounts receivable considered to be uncollectible based upon historical experience and credit evaluation. Due to these factors, no additional losses beyond the amounts provided for collection losses is believed by management to be probable in the Company’s accounts receivable. Significant customers are those that represent 10% or more of revenue or accounts receivable and are set forth in the following tables: Revenue Revenue Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Customer A * * * 11 % Customer B * 13 % * 12 % Customer C * 15 % * * Accounts Receivable, Net As of As of June 30, 2023 December 31, 2022 Customer D 12 % * Customer E 12 % * Customer F * 12 % Customer G * 11 % * Less than 10% of total Certain of the components and subassemblies included in the Company’s products are obtained and manufactured from a single source or a limited group of suppliers. Although the Company seeks to reduce dependence on those single or limited source suppliers, the partial or complete loss of certain of these sources could have a material adverse effect on the Company’s operating results, financial condition and cash flows and damage its customer relationships.
Warrant Liability	Warrant Liability The Company’s liability for the Warrants, as further discussed and defined in Note 10, Debt , is based on a valuation model utilizing observable inputs from active markets. The fair value of the warrant liability is classified within Level 3 of the fair value hierarchy as it is based on significant inputs not observable in the market. The Company establishes the fair value for the Warrants using a Monte Carlo simulation model. Due to the variable number of shares for which the warrants were exercisable, they failed to qualify for equity classification under the indexation guidance in Accounting Standards Codification 815 ("ASC 815"). Therefore, the Warrants are classified as liabilities at fair value on the condensed consolidated balance sheet. Each reporting period, the Warrants are recorded at fair value, with changes in fair value recognized in the Company’s consolidated statement of operations within interest expense.
Embedded Derivatives	Embedded Derivatives In connection with the Superpriority Credit Agreement, as defined in Note 10, Debt , the Company identified certain embedded features requiring bifurcation as derivatives under ASC 815. These embedded derivatives are required to be bifurcated from the debt host contract at fair value with subsequent changes in fair value recognized in earnings at each balance sheet date (see Note 8, Derivative Financial Instruments ). The Superpriority Term Loans, as defined and discussed in Note 10, Debt , include three embedded features; contingent interest upon an uncured event of default; mandatory prepayment upon certain excess cash flow; and mandatory prepayment upon an uncured event of default. Pursuant to ASC 815, these features have been identified as embedded derivative financial instruments. These embedded derivatives are required to be accounted for as derivatives and bifurcated from the host debt contract, resulting in remeasurement at each balance sheet date, with the change in fair value recognized in the Company’s condensed consolidated statement of operations. The fair value of the embedded derivatives is classified within Level 3 of the fair value hierarchy as it is based on significant inputs not observable in the market. The fair value of the embedded derivatives is based on a valuation model utilizing a with and without analysis of the embedded features within the debt facility. The Company runs a Monte Carlo simulation model with the embedded derivatives, and then runs a separate Monte Carlo simulation model for the overall debt facility, without the embedded derivative features. The difference between these two Monte Carlo simulation models is used to obtain the value of the embedded features.
Impact of Recently Adopted and Issued Accounting Standards	Impact of Recently Adopted or Issued Accounting Standards There have been no recently adopted or issued accounting standards that are applicable to the Company since December 31, 2022.
Other	Other Other than the disclosures above, there have been no changes to the significant accounting policies disclosed in Note 2 Summary of Significant Accounting Policies to the Company’s consolidated financial statements included in its Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2023
Accounting Policies [Abstract]
Summary of Reconciliation of Cash, Cash Equivalents and Restricted Cash in Accompanying Condensed Consolidated Balance Sheets	The following table is a reconciliation of cash, cash equivalents and restricted cash included in the accompanying condensed consolidated balance sheets that sum to the total cash, cash equivalents and restricted cash included in the accompanying condensed consolidated statements of cash flows: June 30, 2023 June 30, 2022 Cash and cash equivalents $ 64,265 $ 195,832 Restricted cash included in other assets 1,625 3,104 $ 65,890 $ 198,936
Schedule of Accounts Receivable	Accounts receivable as of June 30, 2023 and December 31, 2022 consisted of the following: June 30, December 31, Current portion of accounts receivable, net: Accounts receivable, net $ 47,400 $ 74,407 Accounts receivable, extended payment terms — 77 $ 47,400 $ 74,484
Schedule of Significant Customers Represent 10% or More of Revenue or Accounts Receivable	Significant customers are those that represent 10% or more of revenue or accounts receivable and are set forth in the following tables: Revenue Revenue Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Customer A * * * 11 % Customer B * 13 % * 12 % Customer C * 15 % * * Accounts Receivable, Net As of As of June 30, 2023 December 31, 2022 Customer D 12 % * Customer E 12 % * Customer F * 12 % Customer G * 11 % * Less than 10% of total

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets Net	Intangible assets, net consisted of intangible assets resulting from the acquisition of NetComm and purchased software to be used in the Company’s products. Intangible assets, net consisted of the following at June 30, 2023 and December 31, 2022, respectively: Cost Accumulated Net Balance Developed Technology $ 25,000 $ ( 14,288 ) $ 10,712 Customer Relationships 18,000 ( 7,200 ) 10,800 Trade Name 1,000 ( 1,000 ) — Purchased software 2,638 ( 1,317 ) 1,321 Totals as of June 30, 2023 $ 46,638 $ ( 23,805 ) $ 22,833 Cost Accumulated Net Balance Developed Technology $ 25,000 $ ( 12,502 ) $ 12,498 Customer Relationships 18,000 ( 6,300 ) 11,700 Trade Name 1,000 ( 1,000 ) — Purchased software 2,545 ( 984 ) 1,561 Totals as of December 31, 2022 $ 46,545 $ ( 20,786 ) $ 25,759
Schedule of Amortization Expense on Existing Intangible Assets	As of June 30, 2023, amortization expense on existing intangible assets for the next five years and beyond is as follows: Year Ending December 31, Remainder of 2023 $ 3,003 2024 5,929 2025 5,784 2026 3,617 2027 1,800 Thereafter 2,700 $ 22,833
Summary of Amortization Expense	A summary of amortization expense recorded during the three and six months ended June 30, 2023 and 2022 is as follows: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Product cost of revenue $ 893 $ 893 $ 1,786 $ 1,786 Research and development 169 141 333 244 Selling, general and administrative 450 533 900 1,070 Totals $ 1,512 $ 1,567 $ 3,019 $ 3,100

Inventory (Tables)

Inventory (Tables)	6 Months Ended
	Jun. 30, 2023
Inventory Disclosure [Abstract]
Schedule of Inventory	Inventory as of June 30, 2023 and December 31, 2022 consisted of the following: June 30, December 31, Raw materials $ 40,053 $ 47,581 Finished goods: Manufactured finished goods 42,975 32,863 Deferred inventory costs 1,057 1,351 $ 84,085 $ 81,795

Property and Equipment (Tables)

Property and Equipment (Tables)	6 Months Ended
	Jun. 30, 2023
Property, Plant and Equipment [Abstract]
Summary of Components of Property and Equipment	Property and equipment as of June 30, 2023 and December 31, 2022 consisted of the following: June 30, December 31, Computers and purchased software $ 23,660 $ 25,572 Leasehold improvements 4,197 4,226 Furniture and fixtures 2,381 2,471 Machinery and equipment 24,834 34,502 Land 3,091 3,091 Building 4,765 4,765 Building improvements 7,391 7,374 Trial systems at customers’ sites 1,957 2,582 72,276 84,583 Less: Accumulated depreciation and amortization ( 54,675 ) ( 65,065 ) $ 17,601 $ 19,518

Accrued Expenses and Other Cu_2

Accrued Expenses and Other Current Liabilities (Tables)	6 Months Ended
	Jun. 30, 2023
Payables and Accruals [Abstract]
Schedule of Accrued Expenses and Other Current Liabilities	Accrued expenses and other current liabilities as of June 30, 2023 and December 31, 2022 consisted of the following: June 30, December 31, Current liabilities Accrued compensation and related taxes $ 14,671 $ 11,666 Accrued warranty 1,388 1,678 Inventory-related accruals 6,219 5,819 Warranty settlement provision (see Note 18) 3,659 3,761 Other accrued expenses 9,638 8,901 Accrued expenses and other current liabilities $ 35,575 $ 31,825 Non-current liabilities Warranty settlement provision, net of current portion (see Note 18) $ 5,911 $ 6,119 Other accrued expenses, net of current portion 1,857 1,787 Other liabilities, net of current portion $ 7,768 $ 7,906
Summary of Changes in Amount Reserved for Warranty Costs	The following table presents a summary of changes in the amount reserved for warranty costs for the six months ended June 30, 2023 and 2022: Six Months Ended June 30, 2023 2022 Warranty reserve at beginning of period $ 1,678 $ 2,392 Provisions 294 1,670 Charges ( 584 ) ( 931 ) Warranty reserve at end of period $ 1,388 $ 3,131

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2023
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value of Financial Assets and Liabilities	The following tables present information about the fair value of the Company’s financial assets and liabilities as of June 30, 2023 and December 31, 2022 and indicate the level of the fair value hierarchy utilized to determine such fair values: Fair Value Measurements as of June 30, 2023 Using: Level 1 Level 2 Level 3 Total Assets: Money market mutual funds $ 36,265 $ — $ — $ 36,265 $ 36,265 $ — $ — $ 36,265 Liabilities: Warrant liability $ — $ — $ 20,305 $ 20,305 Embedded derivatives — — 1,240 1,240 $ — $ — $ 21,545 $ 21,545 Fair Value Measurements as of December 31, 2022 Using: Level 1 Level 2 Level 3 Total Assets: Certificates of deposit—restricted cash $ — $ 1,013 $ — $ 1,013 Money market mutual funds 90,984 — — 90,984 $ 90,984 $ 1,013 $ — $ 91,997
Warrant Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Schedule of Key Inputs into Valuation Models	The key inputs into the valuation models were as follows: Three Months Ended June 30, 2023 Risk-free interest rate 3.9 % Correlated random variable ( 0.3 ) Expected volatility - revenue 45.0 % Expected volatility - equity 90.0 % Vesting dates 6/15/2023 1/1/2024 1/1/2025 Simulated stock price $ 1.01
Embedded Derivatives
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Schedule of Key Inputs into Valuation Models	The key inputs into the valuation models for both the with and without were as follows: Three Months Ended June 30, 2023 Risk-free interest rate 3.9 % Correlated random variable ( 0.3 ) Expected volatility - revenue 45.0 % Expected volatility - equity 90.0 % Revenue discount rate 11.3 % Discount rate 17.0 %

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
Schedule of Current Debt Obligations	Current debt obligations reflected in the condensed consolidated balance sheets as of June 30, 2023 and December 31, 2022 consisted of the following: June 30, December 31, 2023 2022 Current liabilities: Original Term Loans $ 5,036 $ 226,009 Superpriority Term Loans 1,870 — Current portion of long-term debt 6,906 226,009 Unamortized debt issuance costs, current portion ( 557 ) ( 848 ) Current portion of long-term debt, net of unamortized debt issuance costs $ 6,349 $ 225,161 Non-current liabilities: Superpriority Term Loans $ 185,841 $ — Unamortized debt issuance costs, net of current portion ( 13,923 ) — Long-term debt, net of current portion and unamortized debt issuance costs $ 171,918 $ —
Schedule of Aggregate Minimum Future Principal Payments of Debt	As of June 30, 2023, aggregate minimum future principal payments of the Company's debt are summarized as follows: Year Ending December 31, Remainder of 2023 $ 5,973 2024 1,861 2025 1,842 2026 1,824 2027 181,247 $ 192,747

Stock-based Compensation (Table

Stock-based Compensation (Tables)	6 Months Ended
	Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]
Summary of Stock Options Activity	A summary of stock option activity for the six months ended June 30, 2023 is as follows: Number Weighted- Weighted- Aggregate (in years) Outstanding at January 1, 2023 6,537 $ 7.55 4.42 $ 134 Granted 29 1.15 Exercised ( 1 ) 2.23 Forfeited ( 301 ) 6.23 Outstanding at June 30, 2023 6,264 $ 7.59 3.95 $ 3 Options exercisable at June 30, 2023 5,302 $ 8.25 3.08 $ — Vested or expected to vest at June 30, 2023 6,215 $ 7.62 3.91 $ 3
Assumptions of Estimated Fair Value of Option on the Date of Grant Using Black-Scholes Option Pricing Model	The fair value of each option is estimated on the date of grant using the Black-Scholes option-pricing model using the following assumptions: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Risk-free interest rate 3.9 % 3.0 %– 3.2 % 3.5 %– 3.9 % 1.7 – 3.2 % Expected term (in years) 6.1 5.6 – 6.3 6.1 5.6 – 6.3 Expected volatility 44.75 % 40.5 – 41.5 % 44.3 %– 44.8 % 38.5 – 41.5 % Expected dividend yield 0.0 % 0.0 % 0.0 % 0.0 %
Summary of RSU Activity	A summary of RSU activity for the six months ended June 30, 2023 is as follows: Number of Weighted- Aggregate Unvested balance at January 1, 2023 5,505 $ 4.49 Granted 4,324 1.02 Vested ( 2,531 ) 4.04 $ 6,132 Forfeited ( 185 ) 5.14 Unvested balance at June 30, 2023 7,113 $ 2.46
Summary of PSU Activity	A summary of PSU activity for the six months ended June 30, 2023 is as follows: Number of Weighted- Aggregate Unvested balance at January 1, 2023 1,262 $ 4.15 Granted — — Vested ( 1,238 ) 3.48 $ 2,102 Forfeited — — Unvested balance at June 30, 2023 24 $ 7.89
Assumptions of Estimated Based on Monte Carlo Simulation Model	Compensation expense is based on the estimated value of the awards on the grant date, and is recognized over the period from the grant date through the expected vest dates of each vesting condition, both of which were estimated based on a Monte Carlo simulation model applying the following key assumptions: Three and six months ended June 30, 2022 Risk-free interest rate 2.8 % Volatility 79.1 % Dividend yield 0.0 % Cost of equity 13.2 %
Schedule of Stock-based Compensation Expense	Stock-based compensation expense related to stock options, RSUs, SARs and PSUs for the three and six months ended June 30, 2023 and 2022 was classified in the condensed consolidated statements of operations and comprehensive loss as follows: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Cost of revenue $ 11 $ 26 $ 37 $ 61 Research and development expenses 552 694 1,252 1,289 Selling, general and administrative expenses 1,245 2,159 4,641 4,157 Total stock-based compensation $ 1,808 $ 2,879 $ 5,930 $ 5,507 The Company recognized stock-based compensation expense for the three and six months ended June 30, 2023 and 2022 in the condensed consolidated balance sheet as follows: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Change in fair value of SAR Liability $ — $ ( 56 ) $ — $ ( 159 ) Recognized as additional paid-in capital 1,808 2,935 5,930 5,666 Total stock-based compensation $ 1,808 $ 2,879 $ 5,930 $ 5,507

Net Loss per Share (Tables)

Net Loss per Share (Tables)	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Schedule of Potential Common Shares Excluded from the Computation of Diluted Net Loss Per Share Attributable to Common Stockholders	The following potential common shares were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because including them would have been anti-dilutive: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Options to purchase common stock 6,264 7,110 6,264 7,110 Unvested restricted stock units 7,113 5,108 7,113 5,108 Unvested performance-based stock units 24 1,262 24 1,262

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	6 Months Ended
	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Summary of Disaggregation of Revenue Based on Geographic Locations Determined by Customer's Shipping Address	The Company also disaggregates its revenue based on geographic locations of its customers, as determined by the customer’s shipping address, summarized as follows: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 North America: United States $ 15,345 $ 22,697 $ 32,571 $ 36,232 Canada 11,773 9,340 15,557 25,099 Total North America 27,118 32,037 48,128 61,331 Europe, Middle East and Africa: 5,520 4,886 11,428 11,166 Asia-Pacific: Australia 13,079 20,774 25,841 37,292 Other 5,842 7,411 9,646 15,591 Total Asia-Pacific 18,921 28,185 35,487 52,883 Latin America 6,444 5,728 8,257 9,855 Total revenue (1) $ 58,003 $ 70,836 $ 103,300 $ 135,235 (1) Other than the United States, Canada and Australia, no individual countries represented 10 % or more of the Company’s total revenue for any of the periods presented.
Summary of Disaggregates of Revenue Based on Product Line	The Company also disaggregates its revenue based on product lines as determined by the technical characteristics of the product. As telecommunication technologies, and the market for them evolves, the categorization of our products is subject to shifts that management monitors and reevaluates as necessary. Accordingly, beginning with the three months ended March 31, 2023, the Company updated its product line reporting. Revenue amounts for the three and six months ended June 30, 2022 have been reclassified to conform with 2023 reporting. Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Product revenue: Access devices $ 26,984 $ 35,005 $ 51,892 $ 66,753 Cable 18,727 16,102 25,645 35,875 Cloud 276 8,034 3,699 9,058 Total product revenue 45,987 59,141 81,236 111,686 Service revenue: Access devices $ 1,233 $ 1,869 2,079 3,630 Cable 8,766 9,097 17,182 17,953 Cloud 2,017 729 2,803 1,966 Total service revenue 12,016 11,695 22,064 23,549 Total revenue $ 58,003 $ 70,836 $ 103,300 $ 135,235

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2023
Segment Reporting [Abstract]
Schedule of Property and Equipment, Net by Location	The Company’s property and equipment, net by location was as follows: June 30, December 31, U.S. $ 13,663 $ 14,679 China 2,666 3,017 Australia 665 1,054 Other 607 768 Total property and equipment, net $ 17,601 $ 19,518

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2023
Leases [Abstract]
Schedule of Components of Lease Expense	The components of lease expense were as follows: Three Months Ended Six Months Ended June 30, 2023 June 30, 2023 Financing lease cost $ — $ — Operating lease cost 551 1,106 Short-term lease cost 1 2 Variable lease cost 73 128 Total lease cost $ 625 $ 1,236
Summary of Supplemental Cash Flow Information Related to Operating Leases	Supplemental cash flow information related to leases was as follows: Six Months Ended June 30, 2023 Cash paid for operating leases included in cash flows from operating activities $ 1,055 Right-of-use assets obtained in exchange for new operating leases 55
Summary of Supplemental Balance Sheet Information Related to Operating Leases	Supplemental balance sheet information related to leases was as follows: Six Months Ended Year Ended June 30, 2023 December 31, 2022 Weighted average remaining lease term for operating leases 3.32 years 3.58 years Weighted average discount rate for operating leases 4.1 % 4.0 %
Summary of Maturities of Operating Lease Liabilities	Maturities of operating lease liabilities were as follows: Year Ending December 31, 2023 $ 1,110 2024 1,319 2025 948 2026 841 2027 565 Thereafter 2 Total future minimum lease payments $ 4,785 Less: amounts representing interest ( 329 ) Total lease liabilities 4,456 Less: current operating lease liability ( 1,715 ) Long term operating lease liability 2,741

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Significant Accounting Policies [Line Items]
Restricted cash	$ 1,625,000	$ 3,104,000	$ 1,625,000	$ 3,104,000
Selling, general and administrative	20,985,000	21,970,000	45,442,000	44,299,000
Customer-Sponsored Program
Significant Accounting Policies [Line Items]
Sale of accounts receivable	20,773,000		20,773,000
Selling, general and administrative	198,000		198,000
Accounts Receivable, Extended Payment Terms
Significant Accounting Policies [Line Items]
Reserve for credit losses	0	$ 0	0	0	$ 0
Write off of uncollectible receivables			0	$ 0
Certificates of Deposit
Significant Accounting Policies [Line Items]
Restricted cash	1,000,000		1,000,000		1,013,000
Cash
Significant Accounting Policies [Line Items]
Restricted cash	$ 625,000		$ 625,000		$ 2,100,000

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Summary of Reconciliation of Cash, Cash Equivalents and Restricted Cash in Accompanying Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2023		Dec. 31, 2022	Jun. 30, 2022		Dec. 31, 2021
Accounting Policies [Abstract]
Cash and cash equivalents	$ 64,265		$ 126,312	$ 195,832
Restricted cash included in other assets	$ 1,625			$ 3,104
Restricted Cash and Cash Equivalents, Noncurrent, Asset, Statement of Financial Position [Extensible List]	Other assets			Other assets
Cash and cash equivalents, restricted cash	$ 65,890	[1]	$ 129,425	$ 198,936	[1]	$ 157,804
[1] See Note 2 of the accompanying notes for a reconciliation of the ending balance of cash, cash equivalents and restricted cash shown in these unaudited condensed consolidated statements of cash flows.

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Schedule of Accounts Receivable (Details) - USD ($) $ in Thousands		Jun. 30, 2023	Dec. 31, 2022
Current portion of accounts receivable, net:
Current portion of accounts receivable, net	[1]	$ 47,400	$ 74,484
Accounts Receivable, Net
Current portion of accounts receivable, net:
Current portion of accounts receivable, net		47,400	74,407
Accounts Receivable, Extended Payment Terms
Current portion of accounts receivable, net:
Current portion of accounts receivable, net		$ 0	$ 77
[1] Includes accounts receivable due from a related party of $ 3,635 and $ 6,044 at June 30, 2023 and December 31, 2022, respectively (see Note 16)

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Schedule of Significant Customers Represent 10% or More of Revenue or Accounts Receivable (Details) - Customer Concentration Risk	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Revenue | Customer A
Concentration Risk [Line Items]
Concentration risk percentage			11%
Revenue | Customer B
Concentration Risk [Line Items]
Concentration risk percentage	13%		12%
Revenue | Customer C
Concentration Risk [Line Items]
Concentration risk percentage	15%
Accounts Receivable | Customer D
Concentration Risk [Line Items]
Concentration risk percentage		12%
Accounts Receivable | Customer E
Concentration Risk [Line Items]
Concentration risk percentage		12%
Accounts Receivable | Customer F
Concentration Risk [Line Items]
Concentration risk percentage				12%
Accounts Receivable | Customer G
Concentration Risk [Line Items]
Concentration risk percentage				11%

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Schedule of Intangible Assets, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Finite Lived Intangible Assets [Line Items]
Cost	$ 46,638	$ 46,545
Accumulated Amortization	(23,805)	(20,786)
Net Balance	22,833	25,759
Developed Technology | NetComm Wireless Limited
Finite Lived Intangible Assets [Line Items]
Cost	25,000	25,000
Accumulated Amortization	(14,288)	(12,502)
Net Balance	10,712	12,498
Customer Relationships | NetComm Wireless Limited
Finite Lived Intangible Assets [Line Items]
Cost	18,000	18,000
Accumulated Amortization	(7,200)	(6,300)
Net Balance	10,800	11,700
Trade Name | NetComm Wireless Limited
Finite Lived Intangible Assets [Line Items]
Cost	1,000	1,000
Accumulated Amortization	(1,000)	(1,000)
Purchased Software | NetComm Wireless Limited
Finite Lived Intangible Assets [Line Items]
Cost	2,638	2,545
Accumulated Amortization	(1,317)	(984)
Net Balance	$ 1,321	$ 1,561

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Schedule of Amortization Expense on Existing Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2023	$ 3,003
2024	5,929
2025	5,784
2026	3,617
2027	1,800
Thereafter	2,700
Net Balance	$ 22,833	$ 25,759

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Summary of Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Finite Lived Intangible Assets [Line Items]
Amortization expense	$ 1,512	$ 1,567	$ 3,019	$ 3,100
Product Cost of Revenue
Finite Lived Intangible Assets [Line Items]
Amortization expense	893	893	1,786	1,786
Research and Development
Finite Lived Intangible Assets [Line Items]
Amortization expense	169	141	333	244
Selling, General and Administrative
Finite Lived Intangible Assets [Line Items]
Amortization expense	$ 450	$ 533	$ 900	$ 1,070

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 50,177	$ 50,177	$ 50,177

Inventory - Schedule of Invento

Inventory - Schedule of Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Inventory Disclosure [Abstract]
Raw materials	$ 40,053	$ 47,581
Finished goods:
Manufactured finished goods	42,975	32,863
Deferred inventory costs	1,057	1,351
Total inventory	$ 84,085	$ 81,795

Property and Equipment - Summar

Property and Equipment - Summary of Components of Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 72,276	$ 84,583
Less: Accumulated depreciation and amortization	(54,675)	(65,065)
Property and equipment, net	17,601	19,518
Computers and Purchased Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	23,660	25,572
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	4,197	4,226
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	2,381	2,471
Machinery and Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	24,834	34,502
Land
Property Plant And Equipment [Line Items]
Property and equipment, gross	3,091	3,091
Building
Property Plant And Equipment [Line Items]
Property and equipment, gross	4,765	4,765
Building Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	7,391	7,374
Trial Systems at Customers' Sites
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 1,957	$ 2,582

Property and Equipment - Additi

Property and Equipment - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense on property and equipment	$ 1,341	$ 1,958	$ 2,720	$ 4,040

Accrued Expenses and Other Cu_3

Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current liabilities
Accrued compensation and related taxes	$ 14,671	$ 11,666
Accrued warranty	1,388	1,678
Inventory-related accruals	6,219	5,819
Warranty settlement provision	3,659	3,761
Other accrued expenses	9,638	8,901
Accrued expenses and other current liabilities	35,575	31,825
Non-current liabilities
Warranty settlement provision, net of current portion	5,911	6,119
Other accrued expenses, net of current portion	1,857	1,787
Other liabilities, net of current portion	$ 7,768	$ 7,906

Accrued Expenses and Other Cu_4

Accrued Expenses and Other Current Liabilities - Additional Information (Details) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Apr. 30, 2023 Employee	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)
Accrued Expenses And Other Current Liabilities [Line Items]
Accrued serverance expenses				$ 2,199
Stock-based compensation expense		$ 1,808	$ 2,879	$ 5,930	$ 5,507
Standard product warranty description				the Company’s products are covered by warranties for software and hardware for periods ranging from 90 days to two years.
Extended product warranty description				the Company offers an extended warranty for periods typically of one to three years for agreed-upon fees.
Estimated reduction in current workforce, number of employees | Employee	134
Percentage of estimated workforce to be reduced	13%
Employee Severance and Other Employee Related Costs
Accrued Expenses And Other Current Liabilities [Line Items]
Restructuring charges		$ 2,151		$ 2,151
Separation Agreement
Accrued Expenses And Other Current Liabilities [Line Items]
Stock-based compensation expense				3,936
Separation Agreement | Mr. Jerry Guo
Accrued Expenses And Other Current Liabilities [Line Items]
Stock-based compensation expense				$ 1,737
Minimum
Accrued Expenses And Other Current Liabilities [Line Items]
Product warranties period for software and hardware				90 days
Extended product warranty period for renewals of maintenance and support contracts				1 year
Maximum
Accrued Expenses And Other Current Liabilities [Line Items]
Product warranties period for software and hardware				2 years
Extended product warranty period for renewals of maintenance and support contracts				3 years

Accrued Expenses and Other Cu_5

Accrued Expenses and Other Current Liabilities - Summary of Changes in Amount Reserved for Warranty Costs (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Product Warranties Disclosures [Abstract]
Warranty reserve at beginning of period	$ 1,678	$ 2,392
Provisions	294	1,670
Charges	(584)	(931)
Warranty reserve at end of period	$ 1,388	$ 3,131

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Assets:
Assets fair value	$ 36,265	$ 91,997
Liabilities:
Liabilities fair value	21,545
Certificates of Deposit - Restricted Cash
Assets:
Assets fair value		1,013
Money Market Mutual Funds
Assets:
Assets fair value	36,265	90,984
Warrant Liability
Liabilities:
Liabilities fair value	20,305
Embedded Derivatives
Liabilities:
Liabilities fair value	1,240
Level 1
Assets:
Assets fair value	36,265	90,984
Level 1 | Money Market Mutual Funds
Assets:
Assets fair value	36,265	90,984
Level 2
Assets:
Assets fair value		1,013
Level 2 | Certificates of Deposit - Restricted Cash
Assets:
Assets fair value		$ 1,013
Level 3
Liabilities:
Liabilities fair value	21,545
Level 3 | Warrant Liability
Liabilities:
Liabilities fair value	20,305
Level 3 | Embedded Derivatives
Liabilities:
Liabilities fair value	$ 1,240

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - USD ($)		6 Months Ended
	Jun. 15, 2023	Jun. 30, 2023	Jun. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, assets, transfers from Level 1 to Level 2		$ 0	$ 0
Fair value, assets, transfers from Level 2 to Level 1		0	0
Fair value, assets, transfers into Level 3		0	0
Fair value, assets, transfers out of Level 3		$ 0	$ 0
Debt instrument fair value	$ 186,990,000
10% Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants right to purchase shares of common stock	9,691
Warrants vesting dates	Jun. 15, 2023
5% Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants right to purchase shares of common stock	4,846
Warrants vesting dates	Jan. 01, 2024
4.99% Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants right to purchase shares of common stock	4,836
Warrants vesting dates	Jan. 01, 2025

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Key Inputs into Valuation Models (Details)		3 Months Ended
	Jun. 15, 2023	Jun. 30, 2023
10% Warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants vesting dates	Jun. 15, 2023
5% Warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants vesting dates	Jan. 01, 2024
4.99% Warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants vesting dates	Jan. 01, 2025
Level 3 | Risk-free interest rate | Warrant Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and rights outstanding, measurement input		3.9
Level 3 | Risk-free interest rate | Embedded Derivatives
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative, measurement input		3.9
Level 3 | Correlated random variable | Warrant Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and rights outstanding, measurement input		(0.3)
Level 3 | Correlated random variable | Embedded Derivatives
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative, measurement input		(0.3)
Level 3 | Expected volatility - revenue | Warrant Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and rights outstanding, measurement input		45
Level 3 | Expected volatility - revenue | Embedded Derivatives
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative, measurement input		45
Level 3 | Expected volatility - equity | Warrant Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and rights outstanding, measurement input		90
Level 3 | Expected volatility - equity | Embedded Derivatives
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative, measurement input		90
Level 3 | Simulated stock price | Warrant Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and rights outstanding, measurement input		1.01
Level 3 | Revenue discount rate | Embedded Derivatives
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative, measurement input		11.3
Level 3 | Risky discount rate | Embedded Derivatives
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative, measurement input		17
Level 3 | 10% Warrants | Warrant Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants vesting dates		Jun. 15, 2023
Level 3 | 5% Warrants | Warrant Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants vesting dates		Jan. 01, 2024
Level 3 | 4.99% Warrants | Warrant Liability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants vesting dates		Jan. 01, 2025

Derivative Financial Instrume_2

Derivative Financial Instruments - Additional Information (Details) $ in Thousands	Jun. 30, 2023 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Total derivative liability	$ 1,240
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent, Accrued Expenses And Other Current Liabilities Current

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Provision for (benefit from) income taxes	$ 1,160	$ (4,020)	$ 1,308	$ 6,332
Effective tax rate	(2.30%)	19.40%	(1.60%)	(14.70%)

Debt - Schedule of Current Debt

Debt - Schedule of Current Debt Obligations (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current liabilities:
Unamortized debt issuance costs, current portion	$ (557)	$ (848)
Current portion of long-term debt, net of unamortized debt issuance costs	6,349	225,161
Non-current liabilities:
Unamortized debt issuance costs, non-current portion	(13,923)
Long-term debt, net of current portion and unamortized debt issuance costs	171,918
Original Term Loans
Current liabilities:
Current portion of principal payment obligations	5,036	226,009
Superpriority Term Loans
Current liabilities:
Current portion of principal payment obligations	1,870
Non-current liabilities:
Non-current portion of principal payment obligations	185,841
Term Loans
Current liabilities:
Current portion of principal payment obligations	$ 6,906	$ 226,009

Debt - Schedule of Aggregate Mi

Debt - Schedule of Aggregate Minimum Future Principal Payments Of The Company's Debt (Details) $ in Thousands	Jun. 30, 2023 USD ($)
Debt Disclosure [Abstract]
Remainder of 2023	$ 5,973
2024	1,861
2025	1,842
2026	1,824
2027	181,247
Aggregate minimum future principal payments of debt	$ 192,747

Debt - Additional Information (

Debt - Additional Information (Details) - USD ($) $ in Thousands					3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 15, 2023	Oct. 27, 2022	Dec. 20, 2016	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Debt Instrument [Line Items]
Loss on extinguishment of debt	[1]				$ (28,955)		$ (28,822)
Repayments of debt							$ 41,988	$ 1,500
JPMorgan Chase Bank, N. A.
Debt Instrument [Line Items]
Debt instrument, interest rate description							As a result of the Exchange, $5,036 principal remains outstanding under the Original Term Loans. As a result of the Exchange, the Company, certain lenders party to the Original Credit Agreement and JPMorgan Chase Bank, N.A., as agent, entered into Amendment No. 1 thereto (“Amendment No. 1”) which, among other things, permitted the transaction contemplated by the Exchange and eliminated all mandatory prepayments (other than at maturity) and representations and warranties and most affirmative and negative covenants and events of default previously applicable to the Original Term Loans. The interest rates applicable to the Original Term Loans remain unchanged. Borrowings under the Original Term Loans bear interest at a floating rate, which could be either a synthetic Eurodollar rate plus an applicable margin or, at the Company’s option, a base rate (defined as the highest of (x) the JPMorgan Chase Bank, N.A. prime rate, (y) the federal funds effective rate, plus one-half percent (0.50%) per annum and (z) a one-month Eurodollar rate plus 1.00% per annum) plus an applicable margin. The applicable margin for borrowings under the Original Term Loans is 4.00% per annum for Eurodollar rate loans (subject to a 1.00% per annum interest rate floor) and 3.00% per annum for base rate loans. The interest rate payable under the Original Term Loans is subject to an increase of 2.00% per annum during the continuance of any payment default.
Original Term Loans
Debt Instrument [Line Items]
Exchange for paying down		$ 40,000
Original Term Loans | JPMorgan Chase Bank, N.A. and Barclays Bank PLC and Various Lenders
Debt Instrument [Line Items]
Maximum borrowing amount under facility				$ 300,000
Debt instrument, maturity date				Dec. 20, 2023
Original Term Loans | JPMorgan Chase Bank, N. A.
Debt Instrument [Line Items]
Debt instrument, interest rate stated percentage				4%
Debt instrument, interest rate description							As of June 30, 2023 and December 31, 2022, the interest rate on the Original Term Loans was 9.65% and 8.38% per annum, respectively, which was based on a three-month and one-month Eurodollar rate of 5.65% and 4.38% per annum plus the applicable margin of 4.00% per annum for Eurodollar rate loans.
Debt instrument, effective interest rate percentage					9.65%		9.65%		8.38%
Debt issuance costs				$ 7,811
Debt instrument, principal payment							$ 40,751	1,500
Interest expense, including amortization of debt issuance costs					$ 6,046	$ 3,797	10,955	$ 7,574
Debt instrument, maturity date				Dec. 20, 2023
Original principal amount of term loan amortization percentage				1%
Principal amount of loan			$ 50,000	$ 300,000	5,036		5,036
Repayments of debt			47,116				1,237
Outstanding debt							1,375
Gain on extinguishment of debt, Net of fees			133
Unamortized Debt Issuance Expense			4
Outstanding principal amount of debt, retired			$ 50,591
Principal balance outstanding					$ 5,036		$ 5,036
Original Term Loans | JPMorgan Chase Bank, N. A. | Eurodollar Rate
Debt Instrument [Line Items]
Debt instrument, variable interest rate percentage							4%		4%
Debt instrument, effective interest rate percentage					5.65%		5.65%		4.38%
Original Term Loans | JPMorgan Chase Bank, N. A. | Floor Rate
Debt Instrument [Line Items]
Debt instrument, interest rate stated percentage				1%
Original Term Loans | JPMorgan Chase Bank, N. A. | Base Rate
Debt Instrument [Line Items]
Debt instrument, interest rate stated percentage				3%
Superpriority Term Loans
Debt Instrument [Line Items]
Debt instrument, effectively exchange		$ 218,848
Debt instrument, interest rate stated percentage					12.22%		12.22%
Debt instrument, interest rate description							The Superpriority Term Loans bear interest at the Adjusted Term SOFR Rate (as defined in the Superpriority Credit Agreement) (subject to a 2.00% per annum floor) or Base Rate (as defined in the Superpriority Credit Agreement), as applicable, plus (x) in the case of SOFR Rate Loans (as defined in the Superpriority Credit Agreement), 6.50% per annum or (y) in the case of Base Rate Loans (as defined in the Superpriority Credit Agreement), 5.50% per annum, provided that, the foregoing interest rate margin in respect of both SOFR Rate Loans and Base Rate Loans shall be increased (i) by 0.50% per annum on July 1, 2024 and (ii) by 1.00% per annum on and after January 1, 2025 (for a total increase of 1.50% per annum), if, in each case, the outstanding amount of Superpriority Term Loans on such date is in excess of $125,000 (with continuing effect from such date regardless of the outstanding amount of Superpriority Term Loans at any time after such date of determination); and any time after June 30, 2025, with respect to Superpriority Term Loans (x) in the case of SOFR Rate Loans, 13.00% per annum or (y) in the case of Base Rate Loans, 12.00% per annum. As of June 30, 2023, the interest rate on the Superpriority Term Loans was 12.22% per annum.
Debt instrument, extended maturity date		Dec. 20, 2027
Loss on extinguishment of debt					$ 28,956
Debt instrument, maturity date		Dec. 20, 2027
Percentage of collectively owning or controlling at least		75%
Percentage of total net first lien leverage ratio		1%
Percentage of total net leverage ratio		1.50%
Percentage of loan amortize from principal amount		1%
Percentage of term loan outstanding principal balance		97.80%
Superpriority Term Loans | Maximum
Debt Instrument [Line Items]
Debt instrument, exit fee increasing over time, Percent		20%
Superpriority Term Loans | Minimum
Debt Instrument [Line Items]
Debt instrument, exit fee increasing over time, Percent		3%
Superpriority Term Loans | JPMorgan Chase Bank, N.A. and Barclays Bank PLC and Various Lenders
Debt Instrument [Line Items]
Amount allowed to retain from proceeds		$ 25,000
Term loan part payment		20,000
Superpriority Term Loans | JPMorgan Chase Bank, N. A.
Debt Instrument [Line Items]
Debt issuance costs		509
Additional debt issuance costs		$ 13,279
Percentage on excess cash flow for mandatory prepayments of debt		75%
Superpriority Term Loans | Superpriority Credit Agreement
Debt Instrument [Line Items]
Debt instrument, outstanding amount excess		$ 125,000
Superpriority Term Loans | Superpriority Credit Agreement | Floor Rate
Debt Instrument [Line Items]
Debt instrument, interest rate stated percentage		2%
Superpriority Term Loans | Superpriority Credit Agreement | SOFR Rate
Debt Instrument [Line Items]
Debt instrument, variable interest rate percentage		13%
Debt instrument, interest rate stated percentage		6.50%
Superpriority Term Loans | Superpriority Credit Agreement | Base Rate
Debt Instrument [Line Items]
Debt instrument, variable interest rate percentage		12%
Debt instrument, interest rate stated percentage		5.50%
Superpriority Term Loans | Superpriority Credit Agreement on July 1, 2024 | Base Rate
Debt Instrument [Line Items]
Debt instrument, interest rate increase		0.50%
Superpriority Term Loans | Superpriority Credit Agreement on and after January 1, 2025 | Base Rate
Debt Instrument [Line Items]
Debt instrument, interest rate stated percentage		1%
Debt instrument, interest rate increase		1.50%
Revolving Credit Facility | JPMorgan Chase Bank, N. A.
Debt Instrument [Line Items]
Debt instrument, interest rate increase				2%
Revolving Credit Facility | JPMorgan Chase Bank, N. A. | Federal Funds Effective Rate
Debt Instrument [Line Items]
Debt instrument, variable interest rate percentage				0.50%
Revolving Credit Facility | JPMorgan Chase Bank, N. A. | Eurodollar Rate
Debt Instrument [Line Items]
Debt instrument, variable interest rate percentage				1%
Orginal Revolving Loan | JPMorgan Chase Bank, N.A. and Barclays Bank PLC and Various Lenders
Debt Instrument [Line Items]
Maximum borrowing amount under facility				$ 25,000
Debt instrument, maturity date				Dec. 20, 2021
[1] Loss related to Term Loan B refinancing and issuance of warrants during the three and six months ended June 30, 2023 (see Note 10)

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands		3 Months Ended		6 Months Ended
	Apr. 18, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Feb. 21, 2019
Class Of Stock [Line Items]
Common stock, par value		$ 0.001		$ 0.001		$ 0.001
Securities Purchase Agreement | Verizon Ventures LLC
Class Of Stock [Line Items]
Common stock, par value	$ 0.001
Purchase price per share	$ 4.24
Aggregate purchase price	$ 39,530,000
Issuance costs	$ 160,000
Private Placement | Securities Purchase Agreement | Verizon Ventures LLC
Class Of Stock [Line Items]
Aggregate stock purchased	9,323
Common Stock
Class Of Stock [Line Items]
Stock repurchase program, common stock remaining authorized to be repurchased		$ 60,234		$ 60,234
Stock repurchase program, stock repurchased, shares		0	0	0	204
Stock repurchase program, stock repurchased, value					$ 1,192,000
Aggregate stock purchased			9,323		9,323
Common Stock | Maximum
Class Of Stock [Line Items]
Stock repurchase program, common stock authorized to be repurchased							$ 75,000,000

Stock-based Compensation - Addi

Stock-based Compensation - Additional Information (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cash proceeds received upon the exercise of options		$ 2,000	$ 254,000
Fair value of liability		21,545,000
Unrecognized compensation cost		$ 15,989,000
Weighted-average period of unrecognized compensation cost expected to be recognized		2 years 2 months 4 days
2017 Stock Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized for grant		17,007,000
Number of remaining shares available for grant		3,606,000
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average grant date fair value per share of options		$ 0.48	$ 1.62
Cash proceeds received upon the exercise of options		$ 2,000	$ 255,000
Intrinsic value of stock options exercised		$ 1,000	$ 299,000
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, granted		4,324,000
Number of shares, forfeitures		185,000
Accelerated vesting and release, shares		551,000
Performance-Based Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period	3 years		3 years
Number of shares, granted		0
Accelerated vesting and release, shares		883,000
Stock Appreciation Rights
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period		4 years
Number of shares, granted		0
Number of shares, exercised		0
Number of shares, forfeitures		0
Award expiration period		10 years
Fair value of liability		$ 0		$ 0
Common Stock | RSUs and PSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock in settlement of employee tax withholding obligations		1,422,000	355,000
Selling, General and Administrative Expenses | Chief Executive Officer
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Incremental stock-based compensation cost		$ 1,737,000

Stock-based Compensation - Summ

Stock-based Compensation - Summary Stock Options Activity (Details) - 2017 Stock Incentive Plan $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Outstanding, Beginning Balance | shares	6,537
Number of Shares, Granted | shares	29
Number of Shares, Exercised | shares	(1)
Number of Shares, Forfeited | shares	(301)
Number of Shares, Outstanding, Ending Balance | shares	6,264	6,537
Number of Shares, Options exercisable at June 30, 2023 | shares	5,302
Number of Shares, Vested or expected to vest at June 30, 2023 | shares	6,215
Weighted-Average Exercise Price, Outstanding, Beginning Balance | $ / shares	$ 7.55
Weighted-Average Exercise Price, Granted | $ / shares	1.15
Weighted-Average Exercise Price, Exercised | $ / shares	2.23
Weighted-Average Exercise Price, Forfeited | $ / shares	6.23
Weighted-Average Exercise Price, Outstanding, Ending Balance | $ / shares	7.59	$ 7.55
Weighted-Average Exercise Price, Options exercisable at June 30, 2023 | $ / shares	8.25
Weighted-Average Exercise Price, Vested or expected to vest at June 30, 2023 | $ / shares	$ 7.62
Weighted-Average Remaining Contractual Term, Outstanding	3 years 11 months 12 days	4 years 5 months 1 day
Weighted-Average Remaining Contractual Term, Options exercisable at June 30, 2023	3 years 29 days
Weighted-Average Remaining Contractual Term, Vested or expected to vest at June 30, 2023	3 years 10 months 28 days
Aggregate Intrinsic Value, Outstanding | $	$ 3	$ 134
Aggregate Intrinsic Value, Vested or expected to vest at June 30, 2023 | $	$ 3

Stock-based Compensation - Assu

Stock-based Compensation - Assumptions of Estimated Fair Value of Option on the Date of Grant Using Black-Scholes Option Pricing Model (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate	3.90%
Expected term (in years)	6 years 1 month 6 days		6 years 1 month 6 days
Expected volatility	44.75%
Expected volatility, Minimum		40.50%	44.30%	38.50%
Expected volatility, Maximum		41.50%	44.80%	41.50%
Expected dividend yield	0%	0%	0%	0%
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate		3%	3.50%	1.70%
Expected term (in years)		5 years 7 months 6 days		5 years 7 months 6 days
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate		3.20%	3.90%	3.20%
Expected term (in years)		6 years 3 months 18 days		6 years 3 months 18 days

Stock-based Compensation - Su_2

Stock-based Compensation - Summary of RSU Activity (Details) - Restricted Stock Units $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Beginning Balance | shares	5,505
Number of Shares, Granted | shares	4,324
Number of Shares, Vested | shares	(2,531)
Number of Shares, Forfeited | shares	(185)
Number of Shares, Ending Balance | shares	7,113
Weighted-Average Grant Date Fair Value, Beginning Balance | $ / shares	$ 4.49
Weighted-Average Grant Date Fair Value, Granted | $ / shares	1.02
Weighted-Average Grant Date Fair Value, Vested | $ / shares	4.04
Weighted-Average Grant Date Fair Value, Forfeited | $ / shares	5.14
Weighted-Average Grant Date Fair Value, Ending Balance | $ / shares	$ 2.46
Aggregate Fair Value, Vested | $	$ 6,132

Stock-based Compensation - Su_3

Stock-based Compensation - Summary of PSU Activity (Details) - Performance-Based Stock Units $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of Shares, Beginning Balance	1,262,000
Number of Shares, Granted	0
Number of Shares, Vested	(1,238,000)
Number of Shares, Ending Balance	24,000
Weighted-Average Grant Date Fair Value, Beginning Balance | $ / shares	$ 4.15
Weighted-Average Grant Date Fair Value, Vested | $ / shares	3.48
Weighted-Average Grant Date Fair Value, Ending Balance | $ / shares	$ 7.89
Aggregate Fair Value, Vested | $	$ 2,102

Stock-based Compensation - As_2

Stock-based Compensation - Assumptions of Estimated Based on Monte Carlo Simulation Model (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate	3.90%
Volatility	44.75%
Dividend yield	0%	0%	0%	0%
Performance-Based Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate		2.80%		2.80%
Volatility		79.10%		79.10%
Dividend yield		0%		0%
Cost of equity		13.20%		13.20%

Stock-based Compensation - Sche

Stock-based Compensation - Schedule of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 1,808	$ 2,879	$ 5,930	$ 5,507
Cost of Revenue
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	11	26	37	61
Research and Development Expenses
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	552	694	1,252	1,289
Selling, General and Administrative Expenses
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 1,245	$ 2,159	$ 4,641	$ 4,157

Stock-based Compensation - Su_4

Stock-based Compensation - Summary of Stock-based Compensation Expense Recognized in the Condensed Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-Based Payment Arrangement [Abstract]
Change in fair value of SAR Liability		$ (56)		$ (159)
Recognized as additional paid-in capital	$ 1,808	2,935	$ 5,930	5,666
Total stock-based compensation	$ 1,808	$ 2,879	$ 5,930	$ 5,507

Net Loss per Share - Schedule o

Net Loss per Share - Schedule of Potential Common Shares Excluded from the Computation of Diluted Net Loss Per Share Attributable to Common Stockholders (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Options to Purchase Common Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential common shares excluded from computation of diluted net loss per share	6,264	7,110	6,264	7,110
Unvested Restricted Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential common shares excluded from computation of diluted net loss per share	7,113	5,108	7,113	5,108
Unvested Performance-Based Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Potential common shares excluded from computation of diluted net loss per share	24	1,262	24	1,262

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Summary of Disaggregation of Revenue Based on Geographic Locations Determined by Customer's Shipping Address (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation Of Revenue [Line Items]
Total revenue	[1],[2]	$ 58,003	$ 70,836	$ 103,300	$ 135,235
North America - United States
Disaggregation Of Revenue [Line Items]
Total revenue		15,345	22,697	32,571	36,232
North America - Canada
Disaggregation Of Revenue [Line Items]
Total revenue		11,773	9,340	15,557	25,099
North America
Disaggregation Of Revenue [Line Items]
Total revenue		27,118	32,037	48,128	61,331
Europe, Middle East and Africa
Disaggregation Of Revenue [Line Items]
Total revenue		5,520	4,886	11,428	11,166
Asia-Pacific - Australia
Disaggregation Of Revenue [Line Items]
Total revenue		13,079	20,774	25,841	37,292
Asia-Pacific - Other
Disaggregation Of Revenue [Line Items]
Total revenue		5,842	7,411	9,646	15,591
Asia-Pacific
Disaggregation Of Revenue [Line Items]
Total revenue		18,921	28,185	35,487	52,883
Latin America
Disaggregation Of Revenue [Line Items]
Total revenue		$ 6,444	$ 5,728	$ 8,257	$ 9,855
[1] Includes revenue of $ 4,287 and $ 7,283 during the three and six months ended June 30, 2023 and $ 10,550 during the three and six months ended June 30, 2022 , during which a related party relationship existed (see Note 16) Other than the United States, Canada and Australia, no individual countries represented 10 % or more of the Company’s total revenue for any of the periods presented.

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Summary of Disaggregation of Revenue Based on Geographic Locations Determined by Customer's Shipping Address (Parenthetical) (Details) - Other than United States and Australia	6 Months Ended
	Jun. 30, 2023 Country
Disaggregation Of Revenue [Line Items]
Number of countries represents 10% or more of total revenue	0
Revenue | Geographic Concentration Risk
Disaggregation Of Revenue [Line Items]
Concentration risk percentage	10%

Revenue from Contracts with C_5

Revenue from Contracts with Customers - Summary of Disaggregates of Revenue Based on Product Line (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation Of Revenue [Line Items]
Total revenue	[1],[2]	$ 58,003	$ 70,836	$ 103,300	$ 135,235
Product - Access Devices
Disaggregation Of Revenue [Line Items]
Total revenue		26,984	35,005	51,892	66,753
Product - Cable
Disaggregation Of Revenue [Line Items]
Total revenue		18,727	16,102	25,645	35,875
Product - Cloud
Disaggregation Of Revenue [Line Items]
Total revenue		276	8,034	3,699	9,058
Product
Disaggregation Of Revenue [Line Items]
Total revenue		45,987	59,141	81,236	111,686
Service - Access Devices
Disaggregation Of Revenue [Line Items]
Total revenue		1,233	1,869	2,079	3,630
Service - Cable
Disaggregation Of Revenue [Line Items]
Total revenue		8,766	9,097	17,182	17,953
Service - Cloud
Disaggregation Of Revenue [Line Items]
Total revenue		2,017	729	2,803	1,966
Service
Disaggregation Of Revenue [Line Items]
Total revenue		$ 12,016	$ 11,695	$ 22,064	$ 23,549
[1] Includes revenue of $ 4,287 and $ 7,283 during the three and six months ended June 30, 2023 and $ 10,550 during the three and six months ended June 30, 2022 , during which a related party relationship existed (see Note 16) Other than the United States, Canada and Australia, no individual countries represented 10 % or more of the Company’s total revenue for any of the periods presented.

Revenue from Contracts with C_6

Revenue from Contracts with Customers - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Disaggregation Of Revenue [Line Items]
Revenue remaining performance obligation amount	$ 58,197		$ 58,197
Accounts Receivable
Disaggregation Of Revenue [Line Items]
Contract assets	3,533		3,533		$ 2,674
Deferred Revenue
Disaggregation Of Revenue [Line Items]
Revenue	$ 3,368	$ 2,855	$ 10,605	$ 8,491

Revenue from Contracts with C_7

Revenue from Contracts with Customers - Additional Information (Details1)	Jun. 30, 2023
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-07-01
Disaggregation Of Revenue [Line Items]
Revenue remaining performance obligation, percentage	92%
Revenue, remaining performance obligation, expected timing of satisfaction period	12 months
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Disaggregation Of Revenue [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction period	2 years
Maximum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Disaggregation Of Revenue [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction period	5 years

Segment Information - Additiona

Segment Information - Additional Information (Details)	6 Months Ended
	Jun. 30, 2023 Segment
Segment Reporting [Abstract]
Number of operating segments	1

Segment Information - Schedule

Segment Information - Schedule of Property and Equipment, Net by Location (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Property and equipment, net	$ 17,601	$ 19,518
U.S.
Segment Reporting Information [Line Items]
Property and equipment, net	13,663	14,679
China
Segment Reporting Information [Line Items]
Property and equipment, net	2,666	3,017
Australia
Segment Reporting Information [Line Items]
Property and equipment, net	665	1,054
Other
Segment Reporting Information [Line Items]
Property and equipment, net	$ 607	$ 768

Related Parties - Additional In

Related Parties - Additional Information (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Related Party Transaction [Line Items]
Revenue recognized from transactions	$ 4,287	$ 10,550	$ 7,283	$ 10,550
Due from Affiliates	3,635		$ 3,635		$ 6,044
Restricted Stock Units
Related Party Transaction [Line Items]
Number of shares, granted			4,324
Aggregate fair value vested			$ 6,132
Rongke Xie
Related Party Transaction [Line Items]
Compensation paid			$ 123	144
Rongke Xie | Restricted Stock Units
Related Party Transaction [Line Items]
Number of shares, granted			145
Award vesting period			4 years
Aggregate fair value vested			$ 600
Selling, general and administrative expenses recognized	24	30	52	61
Verizon and Affiliates
Related Party Transaction [Line Items]
Revenue recognized from transactions	4,287	$ 10,550	7,284	10,550
Amounts received in cash			26,110	$ 1,201
Due from Affiliates	3,635		3,635		6,044
Deferred revenue associated with related party	$ 33,913		$ 33,913		$ 18,094

Leases - Additional Information

Leases - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
United States
Lessee, Lease, Description [Line Items]
Non-cancelable operating leases expiration year	2028
Ireland
Lessee, Lease, Description [Line Items]
Non-cancelable operating leases expiration year	2028
China
Lessee, Lease, Description [Line Items]
Non-cancelable operating leases expiration year	2028
Hong Kong
Lessee, Lease, Description [Line Items]
Non-cancelable operating leases expiration year	2028
Spain
Lessee, Lease, Description [Line Items]
Non-cancelable operating leases expiration year	2028
Australia
Lessee, Lease, Description [Line Items]
Non-cancelable operating leases expiration year	2028
Letter of credit amount obtained	$ 625	$ 2,100
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease terms	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease terms	6 years
Options to extend leases	3 additional years
Options to terminate leases	1 year

Leases - Schedule of Components

Leases - Schedule of Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Leases [Abstract]
Operating lease cost	$ 551	$ 1,106
Short-term lease cost	1	2
Variable lease cost	73	128
Total lease cost	$ 625	$ 1,236

Leases - Summary of Supplementa

Leases - Summary of Supplemental Cash Flow Information Related to Operating Leases (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Cash paid for operating leases included in cash flows from operating activities	$ 1,055
Right-of-use assets obtained in exchange for lease obligations:
Right-of-use assets obtained in exchange for new operating leases	$ 55

Leases - Summary of Supplemen_2

Leases - Summary of Supplemental Balance Sheet Information Related to Operating Leases (Details)	Jun. 30, 2023	Dec. 31, 2022
Weighted average remaining lease term
Weighted average remaining lease term for operating leases	3 years 3 months 25 days	3 years 6 months 29 days
Weighted average discount rate
Weighted average discount rate for operating leases	4.10%	4%

Leases - Summary of Maturities

Leases - Summary of Maturities of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Leases [Abstract]
2023	$ 1,110
2024	1,319
2025	948
2026	841
2027	565
Thereafter	2
Total future minimum lease payments	4,785
Less: amounts representing interest	(329)
Total lease liabilities	4,456
Less: current operating lease liability	(1,715)	$ (2,040)
Long term operating lease liability	$ 2,741	$ 3,416

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) $ in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2023 AUD ($)	Dec. 31, 2022 USD ($)	Dec. 23, 2022 USD ($)
Commitments And Contingencies Disclosure [Line Items]
Warranty settlement provision	$ 9,570
Installment, frequency of periodic payment	four equal annual installments
Warranty Settlement Provision
Commitments And Contingencies Disclosure [Line Items]
Alleged costs incurred to date				$ 20,000
Warranty settlement provision	$ 3,398	$ 5,000
Minimum
Commitments And Contingencies Disclosure [Line Items]
Estimated liability related to ongoing indemnification claim	$ 500		$ 1,487