Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of ~~April~~July 23, 2021, the registrant had ~~84,916,932~~85,528,136 shares of common stock, $0.001 par value per share, outstanding.

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements other than statements of historical fact contained in this Quarterly Report on Form 10-Q, including statements regarding our future results of operations and financial position, business strategy and plans and objectives of management for future operations, are forward-looking statements. These statements involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements.

In some cases, you can identify forward-looking statements by terms such as “may,” “might,” “should,” “expects,” “plans,” “anticipates,” “would,” “could,” “intends,” “target,” “projects,” “contemplates,” “believes,” “estimates,” “predicts,” “potential” or “continue” or the negative of these terms or other similar expressions. The forward-looking statements in this Quarterly Report on Form 10-Q are only predictions. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our business, financial condition and results of operations. These forward-looking statements speak only as of the date of this Quarterly Report on Form 10-Q and are subject to a number of risks, uncertainties and assumptions described in the “Risk Factors” section and elsewhere in this Quarterly Report on Form 10-Q. Because forward-looking statements are inherently subject to risks and uncertainties, some of which cannot be predicted or quantified, you should not rely on these forward-looking statements as predictions of future events. The events and circumstances reflected in our forward-looking statements may not be achieved or occur and actual results could differ materially from those projected in the forward-looking statements. Some of the key factors that could cause actual results to differ from our expectations include:

Except as required by applicable law, we do not plan to publicly update or revise any forward-looking statements contained herein, whether as a result of any new information, future events or otherwise.

	March 31,			December 31,			June 30,			December 31,
	2021			2020			2021			2020
Assets
Current assets:
Cash and cash equivalents	$	144,961		$	157,455		$	168,654		$	157,455
Accounts receivable, net of provision for doubtful accounts of $150 and $58 as of March 31, 2021 and December 31, 2020, respectively		92,342			94,124
Accounts receivable, net of provision for doubtful accounts of $147 and $58 as of June 30, 2021 and December 31, 2020, respectively								65,570			94,124
Inventory		96,510			101,204			95,782			101,204
Prepaid expenses and other current assets		9,598			3,864			7,531			3,864
Prepaid income taxes		14,764			14,087			14,526			14,087
Total current assets		358,175			370,734			352,063			370,734
Property and equipment, net		27,239			28,880			25,471			28,880
Accounts receivable, net of current portion		65			143			65			143
Deferred tax assets		1,088			1,150			1,060			1,150
Goodwill		50,177			50,177			50,177			50,177
Intangible assets, net		35,697			35,844			34,171			35,844
Other assets		6,165			6,038			6,196			6,038
Total assets	$	478,606		$	492,966		$	469,203		$	492,966
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable	$	25,513		$	41,203		$	26,299		$	41,203
Accrued expenses and other current liabilities		28,620			39,793			29,417			39,793
Accrued income taxes		9,491			7,463			3,821			7,463
Deferred revenue		21,987			15,531			20,224			15,531
Current portion of long-term debt, net of unamortized debt issuance costs		15,207			15,171			8,418			15,171
Total current liabilities		100,818			119,161			88,179			119,161
Accrued income taxes, net of current portion		9,716			9,520			9,921			9,520
Deferred tax liabilities		7,362			7,282			7,359			7,282
Deferred revenue, net of current portion		3,134			3,520			5,328			3,520
Long-term debt, net of current portion and unamortized debt issuance costs		275,575			276,085			275,153			276,085
Other liabilities, net of current portion		1,166			1,024			1,306			1,024
Total liabilities		397,771			416,592			387,246			416,592
Commitments and contingencies (Note 17)
Stockholders’ equity:
Preferred stock, $0.001 par value; 5,000 shares authorized as of March 31, 2021 and December 31, 2020; 0 shares issued and outstanding as of March 31, 2021 and December 31, 2020		—			—
Common stock, $0.001 par value; 500,000 shares authorized; 86,502 and 85,329 shares issued as of March 31, 2021 and December 31, 2020, respectively; 84,780 and 83,607 shares outstanding as of March 31, 2021 and December 31, 2020, respectively		86			85
Preferred stock, $0.001 par value; 5,000 shares authorized as of June 30, 2021 and December 31, 2020; 0 shares issued and outstanding as of June 30, 2021 and December 31, 2020								—			—
Common stock, $0.001 par value; 500,000 shares authorized; 87,116 and 85,329 shares issued as of June 30, 2021 and December 31, 2020, respectively; 85,394 and 83,607 shares outstanding as of June 30, 2021 and December 31, 2020, respectively								87			85
Treasury stock, at cost; 1,722 shares		(4,826	)		(4,826	)		(4,826	)		(4,826	)
Additional paid-in capital		182,088			183,041			185,809			183,041
Accumulated other comprehensive income		1			337			594			337
Accumulated deficit		(96,514	)		(102,263	)		(99,707	)		(102,263	)
Total stockholders’ equity		80,835			76,374			81,957			76,374
Total liabilities and stockholders’ equity	$	478,606		$	492,966		$	469,203		$	492,966

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

CONDENSED CONSOLIDATED STATEMENTS OF ~~INCOME~~OPERATIONS AND COMPREHENSIVE (LOSS) INCOME

	Three Months Ended March 31,						Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020			2021			2020
Revenue:
Product	$	93,798		$	73,758		$	80,469		$	72,128		$	174,267		$	145,886
Service		10,479			9,865			12,261			11,222			22,740			21,087
Total revenue		104,277			83,623			92,730			83,350			197,007			166,973
Cost of revenue:
Product		47,026			39,644			46,117			39,011			93,143			78,655
Service		1,211			1,326			1,098			1,209			2,309			2,535
Total cost of revenue		48,237			40,970			47,215			40,220			95,452			81,190
Gross profit		56,040			42,653			45,515			43,130			101,555			85,783
Operating expenses:
Research and development		21,606			21,211			20,295			20,688			41,901			41,899
Selling, general and administrative		21,880			24,991			21,583			21,110			43,463			46,101
Total operating expenses		43,486			46,202			41,878			41,798			85,364			88,000
Income (loss) from operations		12,554			(3,549	)		3,637			1,332			16,191			(2,217	)
Other income (expense):
Interest income		114			406			103			271			217			677
Interest expense		(3,918	)		(4,628	)		(3,999	)		(4,307	)		(7,917	)		(8,935	)
(Loss) gain on foreign currency, net		(747	)		152			(231	)		528			(978	)		680
Other income, net		72			62			479			35			551			97
Total other income (expense), net		(4,479	)		(4,008	)		(3,648	)		(3,473	)		(8,127	)		(7,481	)
Income (loss) before provision for (benefit from) income taxes		8,075			(7,557	)
(Loss) income before provision for (benefit from) income taxes								(11	)		(2,141	)		8,064			(9,698	)
Provision for (benefit from) income taxes		2,326			(8,719	)		3,182			887			5,508			(7,832	)
Net income		5,749			1,162
Other comprehensive income (loss)—foreign currency translation adjustment, net of tax		(336	)		(516	)
Other comprehensive income (loss)—gain on foreign currency hedge, net of tax		—			356
Comprehensive income	$	5,413		$	1,002
Net income attributable to common stockholders:
Net (loss) income								(3,193	)		(3,028	)		2,556			(1,866	)
Other comprehensive (loss) income—foreign currency translation adjustment, net of tax								593			99			257			(418	)
Other comprehensive (loss) income—gain on foreign currency hedge, net of tax								—			171			—			527
Comprehensive (loss) income							$	(2,600	)	$	(2,758	)	$	2,813		$	(1,757	)
Net (loss) income attributable to common stockholders:
Basic and diluted	$	5,749		$	1,162		$	(3,193	)	$	(3,028	)	$	2,556		$	(1,866	)
Net income per share attributable to common stockholders:
Net (loss) income per share attributable to common stockholders:
Basic	$	0.07		$	0.01		$	(0.04	)	$	(0.04	)	$	0.03		$	(0.02	)
Diluted	$	0.06		$	0.01		$	(0.04	)	$	(0.04	)	$	0.03		$	(0.02	)
Weighted-average shares used to compute net income per share attributable to common stockholders:
Weighted-average shares used to compute net (loss) income per share attributable to common stockholders:
Basic		84,242			83,990			85,036			83,068			84,641			83,505
Diluted		88,568			85,009			85,036			83,068			89,013			83,505

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

	Common Stock				Treasury Stock					Additional Paid-in			Accumulated Other Comprehensive			Accumulated			Total Stockholders’			Common Stock				Treasury Stock					Additional Paid-in			Accumulated Other Comprehensive		Accumulated			Total Stockholders’
	Shares		Amount		Shares		Amount			Capital			Income			Deficit			Equity			Shares		Amount		Shares		Amount			Capital			Income		Deficit			Equity
Balances at January 1, 2021		85,329	$	85		1,722	$	(4,826	)	$	183,041		$	337		$	(102,263	)	$	76,374
Balances at March 31, 2021																							86,502	$	86		1,722	$	(4,826	)	$	182,088		$	1	$	(96,514	)	$	80,835
Exercise of stock options and common stock issued upon vesting of equity awards, net of shares withheld for employee taxes		1,173		1		—		—			(4,058	)		—			—			(4,057	)		614		1		—		—			(432	)		—		—			(431	)
Foreign currency translation adjustment		—		—		—		—			—			(336	)		—			(336	)		—		—		—		—			—			593		—			593
Stock-based compensation		—		—		—		—			3,105			—			—			3,105			—		—		—		—			4,153			—		—			4,153
Net income		—		—		—		—			—			—			5,749			5,749
Balances at March 31, 2021		86,502	$	86		1,722	$	(4,826	)	$	182,088		$	1		$	(96,514	)	$	80,835
Net loss																							—		—		—		—			—			—		(3,193	)		(3,193	)
Balances at June 30, 2021																							87,116	$	87		1,722	$	(4,826	)	$	185,809		$	594	$	(99,707	)	$	81,957

	Common Stock				Treasury Stock					Additional Paid-in			Accumulated Other Comprehensive			Accumulated			Total Stockholders’			Common Stock				Treasury Stock					Additional Paid-in			Accumulated Other Comprehensive		Accumulated			Total Stockholders’
	Shares		Amount		Shares		Amount			Capital			Loss			Deficit			Equity			Shares		Amount		Shares		Amount			Capital			Income		Deficit			Equity
Balances at January 1, 2020		84,333	$	84		495	$	(1,795	)	$	169,561		$	(2,222	)	$	(127,064	)	$	38,564
Balances at January 1, 2021																							85,329	$	85		1,722	$	(4,826	)	$	183,041		$	337	$	(102,263	)	$	76,374
Exercise of stock options and common stock issued upon vesting of equity awards, net of shares withheld for employee taxes		393		1		—		—			(148	)		—			—			(147	)		1,787		2		—		—			(4,490	)		—		—			(4,488	)
Cash flow hedges		—		—		—		—			—			356			—			356
Foreign currency translation adjustment		—		—		—		—			—			(517	)		—			(517	)		—		—		—		—			—			257		—			257
Repurchases of treasury shares		—		—		1,216		(2,998	)		—			—			—			(2,998	)
Stock-based compensation		—		—		—		—			2,501			—			—			2,501			—		—		—		—			7,258			—		—			7,258
Net income		—		—		—		—			—			—			1,162			1,162			—		—		—		—			—			—		2,556			2,556
Balances at March 31, 2020		84,726	$	85		1,711	$	(4,793	)	$	171,914		$	(2,383	)	$	(125,902	)	$	38,921
Balances at June 30, 2021																							87,116	$	87		1,722	$	(4,826	)	$	185,809		$	594	$	(99,707	)	$	81,957

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

	Common Stock				Treasury Stock					Additional Paid-in		Accumulated Other Comprehensive			Accumulated			Total Stockholders’
	Shares		Amount		Shares		Amount			Capital		Loss			Deficit			Equity
Balances at March 31, 2020		84,726	$	85		1,711	$	(4,793	)	$	171,914	$	(2,383	)	$	(125,902	)	$	38,921
Exercise of stock options and common stock issued upon vesting of equity awards, net of shares withheld for employee taxes		130		—		—		—			75		—			—			75
Cash flow hedges		—		—		—		—			—		171			—			171
Foreign currency translation adjustment		—		—		—		—			—		99			—			99
Repurchases of treasury shares		—		—		11		(33	)		—		—			—			(33	)
Stock-based compensation		—		—		—		—			3,507		—			—			3,507
Net loss		—		—		—		—			—		—			(3,028	)		(3,028	)
Balances at June 30, 2020		84,856	$	85		1,722	$	(4,826	)	$	175,496	$	(2,113	)	$	(128,930	)	$	39,712

	Common Stock				Treasury Stock					Additional Paid-in			Accumulated Other Comprehensive			Accumulated			Total Stockholders’
	Shares		Amount		Shares		Amount			Capital			Loss			Deficit			Equity
Balances at January 1, 2020		84,333	$	84		495	$	(1,795	)	$	169,561		$	(2,222	)	$	(127,064	)	$	38,564
Exercise of stock options and common stock issued upon vesting of equity awards, net of shares withheld for employee taxes		523		1		—		—			(73	)		—			—			(72	)
Cash flow hedges		—		—		—		—			—			527			—			527
Foreign currency translation adjustment		—		—		—		—			—			(418	)		—			(418	)
Repurchases of treasury shares		—		—		1,227		(3,031	)		—			—			—			(3,031	)
Stock-based compensation		—		—		—		—			6,008			—			—			6,008
Net loss		—		—		—		—			—			—			(1,866	)		(1,866	)
Balances at June 30, 2020		84,856	$	85		1,722	$	(4,826	)	$	175,496		$	(2,113	)	$	(128,930	)	$	39,712

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

	Three Months Ended March 31,						Six Months Ended June 30,
	2021			2020			2021			2020
Cash flows (used in) provided by operating activities:
Net income	$	5,749		$	1,162
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Cash flows provided by operating activities:
Net income (loss)							$	2,556		$	(1,866	)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		4,209			4,768			8,197			9,255
Stock-based compensation		3,453			2,437			7,547			6,016
Deferred income taxes		138			(75	)		173			(420	)
Increase in provision for doubtful accounts		91			2			89			23
Change in provision for excess and obsolete inventory		113			519			(6	)		1,118
Gain on disposal of assets		—			10			4			10
Changes in operating assets and liabilities:
Accounts receivable		469			38,021			28,433			40,377
Inventory		4,558			11,873			5,372			6,217
Prepaid expenses and other assets		(5,834	)		(231	)		(3,792	)		1,419
Prepaid income taxes		(680	)		(6,446	)		(441	)		(7,624	)
Accounts payable		(15,607	)		(9,128	)		(14,456	)		1,331
Accrued expenses and other current liabilities		(10,118	)		(8,204	)		(10,210	)		(2,480	)
Accrued income taxes		2,225			(1,609	)		(3,240	)		(1,016	)
Deferred revenue		6,079			(7,030	)		6,489			(8,424	)
Net cash (used in) provided by operating activities		(5,155	)		26,069
Net cash provided by operating activities								26,715			43,936
Cash flows used in investing activities:
Purchases of property and equipment		(852	)		(390	)		(1,514	)		(2,717	)
Purchases of software licenses		(1,400	)		—			(1,400	)		—
Net cash used in investing activities		(2,252	)		(390	)		(2,914	)		(2,717	)
Cash flows used in financing activities:
Principal repayments of debt		(750	)		(830	)		(8,275	)		(1,660	)
Proceeds from exercise of stock options		574			312			1,187			414
Employee taxes paid related to net share settlement of equity awards		(4,630	)		(459	)		(5,675	)		(487	)
Payments of dividends and equitable adjustments		(13	)		(176	)		(59	)		(622	)
Repurchases of treasury stock		—			(2,998	)		—			(3,031	)
Net cash used in financing activities		(4,819	)		(4,151	)		(12,822	)		(5,386	)
Effect of exchange rate changes on cash and cash equivalents		(266	)		(408	)		214			(340	)
Net (decrease) increase in cash, cash equivalents and restricted cash		(12,492	)		21,120
Net increase in cash, cash equivalents and restricted cash								11,193			35,493
Cash, cash equivalents and restricted cash at beginning of period		158,461			114,657			158,461			114,657
Cash, cash equivalents and restricted cash at end of period ⁽¹⁾	$	145,969		$	135,777		$	169,654		$	150,150
Supplemental disclosures of cash flow information:
Cash paid for interest	$	3,682		$	4,194		$	7,358		$	5,502
Cash paid for income taxes	$	290		$	189		$	7,564		$	1,889
Supplemental disclosures of non-cash operating, investing and financing activities:
Purchases of property and equipment included in accounts payable	$	325		$	1,879		$	265		$	564
Unpaid equitable adjustments included in accrued expenses and other current liabilities	$	50		$	555		$	4		$	124
Release of customer incentives included in accounts receivable and accrued expenses and other current liabilities	$	1,076		$	—
Fair value of cash flow hedges							$	—		$	527

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

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, Colombia, the Netherlands, Hong Kong, Australia, Germany, the United Kingdom and New Zealand.

The Company offers physical, virtual and cloud-native 5G ~~infrastructure~~broadband and customer premise networking equipment for public and private high-speed data and multi-service communications networks. The Company’s core and edge ~~infrastructure~~broadband technology enables communications service providers and enterprises to cost-effectively and dynamically increase data network speed, add bandwidth capacity and new services, reduce network complexity, and reduce operating and capital expenditures.

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 communications service provider (“CSP”) industry. These risks include, but are not limited to, the level of capital spending by the CSPs, a lengthy sales cycle, 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 the 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.

The Company is an “emerging growth company,” as defined in the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”), and may remain an emerging growth company until the last day of the fiscal year following the fifth anniversary of the Company’s initial public offering, subject to specified conditions. The JOBS Act provides 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 has elected not to “opt out” of such extended transition period, which means that when a standard is issued or revised, and it has different application dates for public or private companies, the Company is required to adopt the new or revised standard at or prior to the time private companies are required to adopt the new or revised standard, provided that the Company continues to be an emerging growth company. The JOBS Act provides that the decision to take advantage of the extended transition period for complying with new or revised accounting standards is irrevocable.

The accompanying condensed consolidated balance sheet as of ~~March 31,~~June 30, 2021, the condensed consolidated statements of ~~income~~operations and comprehensive (loss) income for the three and six months ended ~~March 31,~~June 30, 2021 and 2020, the condensed consolidated statements of cash flows for the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020 and the condensed consolidated statements of stockholders’ equity for the three and six months ended ~~March 31,~~June 30, 2021 and 2020 are unaudited. The financial data and other information disclosed in these notes related to the three and six months ended ~~March 31,~~June 30, 2021 and 2020 are also unaudited. The accompanying condensed consolidated balance sheet as of December 31, 2020 was derived from the Company’s audited consolidated financial statements for the year ended December 31, 2020 included in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on February 25, 2021 (the “Annual Report on Form 10-K”). The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“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, 2021 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.

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, provision for doubtful accounts, 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 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 ~~emergence of~~ COVID-19 ~~around the world, and particularly in the United States and China,~~pandemic presents various risks to the Company, not all of which the Company is able to fully evaluate or even to foresee at the current time and could have a material effect upon the estimates and judgments relied upon by management in preparing these condensed consolidated financial statements. While the COVID-19 pandemic did not significantly adversely affect the Company’s financial results and business operations in the ~~quarter~~three and six months ended ~~March 31,~~June 30, 2021, economic and health conditions in the United States and across most of the globe changed rapidly during the period and are continuing to change after the end of the quarter. Globally, all aspects of the Company’s business remain fully operational. ~~However, increasing~~The pandemic has led to increased demand for certain of the Company’s products, ~~has~~resulting in increased order volumes that have created additional pressure on the Company’s supply chain. In addition, certain of the Company’s products utilize components, for which there has been increased global demand. As a result, we have begun to see shortages of supply that have increased the likelihood of an adverse impact on the Company’s future revenue and gross margins and ability to fill orders for customers in a timely manner. The Company continues to work with its supply chain ~~which could impact continued availability~~and contract manufacturers, as well as its customers, to minimize the possible extent of ~~inventory requirements.~~such impacts. However, 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~~intends to continue to monitor its business very closely for any effects of COVID-19 for as long as ~~necessary on an ongoing basis.~~necessary.

The Company evaluates events or transactions that occur after the balance sheet date, but prior to the issuance of the financial statements, in order to provide additional evidence for certain estimates or to identify matters that require additional disclosure. The Company has evaluated all subsequent events and determined that there are no material recognized or unrecognized subsequent events requiring disclosure.

Cash and cash equivalents include all highly liquid investments maturing within three months from the date of purchase. As of ~~March 31,~~June 30, 2021 and December 31, 2020, the Company’s cash and cash equivalents consisted of investments in certificates of deposit and money market mutual funds.

Restricted cash as of ~~March 31,~~June 30, 2021 and December 31, 2020 consisted of a certificate of deposit of ~~$1,008~~$1,000 and $1,006, respectively, pledged as collateral for a stand-by letter of credit required to support a contractual obligation.

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:

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 ~~March 31,~~June 30, 2021 and December 31, 2020 consisted of the following:

	March 31, 2021		December 31, 2020		June 30, 2021		December 31, 2020
Current portion of accounts receivable, net:
Accounts receivable, net	$	91,709	$	93,480	$	65,497	$	93,480
Accounts receivable, extended payment terms		633		644		73		644
		92,342		94,124		65,570		94,124
Accounts receivable, net of current portion:
Accounts receivable, extended payment terms		65		143		65		143
	$	92,407	$	94,267	$	65,635	$	94,267

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 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 ~~income~~operations and comprehensive (loss) income.

As of ~~March 31,~~June 30, 2021 and December 31, 2020, the Company concluded that all amounts due under extended payment terms were collectible and no reserve for credit losses was recorded. During the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020, the Company did 0t provide a reserve for credit losses and did 0t write off any uncollectible receivables due under extended payment terms.

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.

Significant customers are those that represent 10% or more of revenue or accounts receivable and are set forth in the following tables:

	Revenue						Accounts Receivable, Net						Revenue						Revenue
	Three Months Ended March 31,						Three Months Ended March 31,						Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020			2021			2020			2021			2020
Customer A		18	%	*				23	%	*				13	%	*				16	%	*
Customer B	*				12	%	*				17	%	*				22	%	*				21	%
Customer C	*				20	%	*			*				15	%	*				17	%	*
Customer D		19	%	*				13	%	*			*				13	%	*			*
Customer E														11	%	*			*			*

Certain of the components and subassemblies included in the Company’s products are obtained from a single source or a limited group of suppliers. Although the Company seeks to reduce dependence on those limited sources of suppliers and manufacturers, 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.

The Company measures stock options and other stock-based awards granted to employees and directors based on the fair value on the date of the grant and recognizes compensation expense of those awards, net of estimated forfeitures, over the requisite service period, which is generally the vesting period of the respective award. Generally, the Company issues stock options with only service-based vesting conditions and records the expense for these awards using the straight-line method.

The Company classifies stock-based compensation expense in its consolidated statements of ~~income~~operations and comprehensive (loss) income ~~(loss)~~ in the same manner in which the award recipient’s payroll costs are classified or in which the award recipient’s service payments are classified.

The Company recognizes compensation expense for only the portion of awards that are expected to vest. In developing a forfeiture rate estimate, the Company has considered its historical experience to estimate pre-vesting forfeitures for service-based awards. The impact of a forfeiture rate adjustment will be recognized in full in the period of adjustment, and if the actual forfeiture rate is materially different from the Company’s estimate, the Company may be required to record adjustments to stock-based compensation expense in future periods.

The Company estimates the fair value of each stock option grant on the date of grant using the Black-Scholes option pricing model. The Company was a private company until December 14, 2017 and lacks sufficient company-specific historical and implied volatility information for its stock. Therefore, for all options granted in 2020 or before, the Company estimated its expected stock volatility based on the historical volatility of publicly traded peer companies. Beginning with options granted in 2021, the Company estimates its expected stock volatility using a weighted-average calculation based on the historical volatility of the Company and publicly traded peer companies and expects to continue to do so until such time as it has adequate historical data regarding the volatility of its own traded stock price. The expected term of the Company’s stock options has been determined utilizing the “simplified” method for awards that qualify as “plain-vanilla” options. The expected term of stock options granted to non-employees is equal to the contractual term of the option award. The risk-free interest rate is determined by reference to the U.S. Treasury yield curve in effect at the time of grant of the award for time periods approximately equal to the expected term of the award. Expected dividend yield is based on the fact that the Company does not have a history of declaring or paying cash dividends, except for the special cash dividends declared in November 2014, June 2016, December 2016, May 2017 and November 2017 and in those circumstances the board of directors approved cash dividends to be paid to holders of the Company’s stock options, stock appreciation rights (“SARs”) and restricted stock units (“RSUs”) upon vesting as an equitable adjustment to the holders of such instruments.

The Company has also granted SARs to certain employees, which require the Company to pay in cash upon exercise an amount equal to the product of the excess of the per share fair market value of the Company’s common stock on the date of exercise over the exercise price, multiplied by the number of shares of common stock with respect to which the SAR is exercised. Because these awards may require the Company to settle the awards in cash, the Company accounts for them as a liability in the Company’s consolidated balance sheets. The Company recognizes the liability related to these awards, as well as related compensation expense over the period during which services are rendered until completed. The Company estimates changes in the fair value of the SAR liability using the Black-Scholes option pricing model and records them in the consolidated statements of income and comprehensive income. After vesting is completed,As all SARs are now fully vested, the Company ~~will continue~~continues to remeasure the fair market value of the liability until the award is either exercised or canceled, with changes in the fair value of the liability recorded in the consolidated statements of ~~income~~operations and comprehensive (loss) income.

In August 2020, the FASB issued ASU 2020-06, Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity. This guidance simplifies the guidance on certain financial instruments with characteristics of liability and equity, including convertible debt instruments. As a result, entities will not separately present in equity an embedded conversion feature in such debt and will account for a convertible debt instrument wholly as debt, unless certain other conditions are met. The elimination of these models will reduce reported interest expense and increase reported net income for entities that have issued a convertible instrument that is within the scope of ASU 2020-06. The ASU also simplifies the diluted earnings per share calculation in certain areas. The guidance will become effective for fiscal years beginning after December 15, 2021, with early adoption permitted no earlier than fiscal years beginning after December 15, 2020. The Company has elected to early adopt this ASU and the adoption did not have a material impact on the Company’s condensed consolidated financial statements and the accompanying notes thereto.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842): Amendments to FASB Accounting Standards Codification (“ASU 2016-02”), which replaces the existing guidance for leases. ASU 2016-02 requires the identification of arrangements that should be accounted for as leases by lessees. In general, for lease arrangements exceeding a twelve-month term, the arrangements must now be recognized as assets and liabilities on the balance sheet of the lessee. Under ASU 2016-02, a right-of-use asset and lease obligation will be recorded for all leases, whether operating or financing, while the income statement will reflect lease expense for operating leases and amortization/interest expense for financing leases. The balance sheet amount recorded for existing leases at the date of adoption of ASU 2016-02 must be calculated using the applicable incremental borrowing rate at the date of adoption. This guidance will become effective for private companies, and emerging growth companies that choose to take advantage of the extended transition periods, for annual reporting periods beginning after December 15, 2021, and interim periods within fiscal years beginning after December 15, 2022. The Company has begun planning for adoption by implementing a new lease accounting software and by working to establish additional changes to internal processes to comply with all requirements upon adoption. The standard allows for, and the Company plans on using, a modified retrospective approach with comparatives under ASC 840, where entities would recognize a cumulative effect to retained earnings at the date of adoption without restating prior period balances or disclosure. Management is continuing to assess the impact of ASU 2016-02 on the Company’s condensed consolidated financial statements and the accompanying notes thereto.

In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). This guidance is intended to provide more decision-useful information about expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The main provisions include presenting financial assets measured at amortized cost at the amount expected to be collected, which is net of an allowance for expected credit losses, and recording credit losses related to available-for-sale securities through an allowance for credit losses. The effective dates for the amendments in ASU 2016-13 were updated in ASU 2019-10, Financial Instruments – Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842), and as such ASU 2016-13 will become effective for private companies, and emerging growth companies that choose to take advantage of the extended transition periods, for fiscal years beginning after December 15, 2022, including interim periods within those fiscal periods, and must be applied using a modified retrospective approach. The Company is currently evaluating the impact ASU 2016-13 will have on its consolidated financial statements.

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 the Annual Report on Form 10-K for the fiscal year ended December 31, 2020.

Intangible assets, net consisted of the following at ~~March 31,~~June 30, 2021 and December 31, 2020:

	Cost		Accumulated Amortization			Net Balance		Cost		Accumulated Amortization			Net Balance
Developed Technology	$	25,000	$	(6,251	)	$	18,749	$	25,000	$	(7,144	)	$	17,856
Customer Relationships		18,000		(3,150	)		14,850		18,000		(3,600	)		14,400
Trade Name		1,000		(581	)		419		1,000		(664	)		336
Purchased software		1,793		(114	)		1,679		1,796		(217	)		1,579
Totals as of March 31, 2021	$	45,793	$	(10,096	)	$	35,697
Totals as of June 30, 2021								$	45,796	$	(11,625	)	$	34,171

As of ~~March 31,~~June 30, 2021, amortization expense on existing intangible assets for the next five years and beyond is as follows:

Year Ending December 31,
2021	$	4,589	$	3,060
2022		5,948		5,951
2023		5,753		5,753
2024		5,651		5,651
2025		5,651		5,651
Thereafter		8,105		8,105
	$	35,697	$	34,171

A summary of amortization expense recorded during the three and six months ended ~~March 31,~~June 30, 2021 and 2020 is as follows:

	Three Months Ended March 31,				Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020		2021		2020
Product cost of revenue	$	893	$	893	$	893	$	893	$	1,786	$	1,786
Research and development		82		—		103		—		185		—
Selling, general and administrative		533		533		533		533		1,066		1,067
Totals	$	1,508	$	1,426	$	1,529	$	1,426	$	3,037	$	2,853

The Company’s goodwill is the result of its acquisition of NetComm on July 1, 2019 and represents the excess of purchase price over the estimated fair value of net assets acquired. There has been no change to the $50,177 carrying amount of goodwill since December 31, 2020.

Inventory as of ~~March 31,~~June 30, 2021 and December 31, 2020 consisted of the following:

	March 31, 2021		December 31, 2020		June 30, 2021		December 31, 2020
Raw materials	$	45,794	$	50,904	$	43,597	$	50,904
Work in process		14		19		1		19
Finished goods:
Manufactured finished goods		50,227		49,764		51,243		49,764
Deferred inventory costs		475		517		941		517
	$	96,510	$	101,204	$	95,782	$	101,204

Property and equipment as of ~~March 31,~~June 30, 2021 and December 31, 2020 consisted of the following:

	March 31, 2021			December 31, 2020			June 30, 2021			December 31, 2020
Computers and purchased software	$	25,219		$	24,865		$	24,878		$	24,865
Leasehold improvements		4,172			4,148			4,182			4,148
Furniture and fixtures		2,642			2,644			2,660			2,644
Machinery and equipment		37,554			36,701			37,161			36,701
Land		3,091			3,091			3,091			3,091
Building		4,765			4,765			4,765			4,765
Building improvements		7,244			7,244			7,255			7,244
Trial systems at customers’ sites		4,639			5,300			4,383			5,300
		89,326			88,758			88,375			88,758
Less: Accumulated depreciation and amortization		(62,087	)		(59,878	)		(62,904	)		(59,878	)
	$	27,239		$	28,880		$	25,471		$	28,880

During the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020, the Company transferred trial systems into inventory from property and equipment with values of ~~$661~~$918 and ~~$237,~~$574, respectively, net of transfers of trial systems to cost of revenue. In addition, the Company transferred ~~$23~~$17 and $9$328 of equipment into inventory from property and equipment during the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020, respectively.

Depreciation and amortization expense on property and equipment totaled ~~$2,701~~$2,459 and ~~$3,347~~$3,055 for the three months ended ~~March 31,~~June 30, 2021 and 2020, respectively and $5,160 and $6,402 for the six months ended June 30, 2021 and 2020, respectively.

Accrued expenses and other current liabilities as of ~~March 31,~~June 30, 2021 and December 31, 2020 consisted of the following:

	March 31, 2021		December 31, 2020		June 30, 2021		December 31, 2020
Accrued compensation and related taxes	$	12,977	$	22,722	$	15,505	$	22,785
Accrued warranty		2,463		2,354		2,597		2,354
Dividends and equitable adjustments payable (see Note 11)		50		63
Other accrued expenses		13,130		14,654		11,315		14,654
	$	28,620	$	39,793	$	29,417	$	39,793

Substantially all of the Company’s products are covered by warranties for software and hardware for periods ranging from 90 days to one year. 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.

A summary of changes in the amount reserved for warranty costs for the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020 is as follows:

	Three Months Ended March 31,						Six Months Ended June 30,
	2021			2020			2021			2020
Warranty reserve at beginning of period	$	2,354		$	2,448		$	2,354		$	2,448
Provisions		866			2,745			1,566			993
Charges		(757	)		(2,839	)		(1,323	)		(1,329	)
Warranty reserve at end of period	$	2,463		$	2,354		$	2,597		$	2,112

The following tables present information about the fair value of the Company’s financial assets and liabilities as of ~~March 31,~~June 30, 2021 and December 31, 2020 and indicate the level of the fair value hierarchy utilized to determine such fair values:

	Fair Value Measurements as of March 31, 2021 Using:								Fair Value Measurements as of June 30, 2021 Using:
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets:
Certificates of deposit—restricted cash	$	—	$	1,008	$	—	$	1,008	$	—	$	1,000	$	—	$	1,000
Money market mutual funds		113,892		—		—		113,892		135,021		—		—		135,021
Foreign currency forward contracts										—		8		—		8
	$	113,892	$	1,008	$	—	$	114,900	$	135,021	$	1,008	$	—	$	136,029
Liabilities:
SARs	$	—	$	—	$	705	$	705	$	—	$	—	$	646	$	646
	$	—	$	—	$	705	$	705	$	—	$	—	$	646	$	646

During the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020, there were 0 transfers between Level 1, Level 2 and Level 3.

There were no changes to the valuation techniques used to measure asset and liability fair values on a recurring basis during the ~~three~~six months ended ~~March 31,~~June 30, 2021 from those included in the Company’s consolidated financial statements for the year ended December 31, 2020. The following table provides a summary of changes in the fair values of the Company’s stock appreciation rights (“SARs”) liability, for which fair value is determined by Level 3 inputs:

	Three Months Ended March 31,						Six Months Ended June 30,
	2021			2020			2021			2020
Fair value at beginning of period	$	493		$	264		$	493		$	264
Change in fair value		347			(65	)		288			7
Exercises		(135	)		—			(135	)		—
Fair value at end of period	$	705		$	199		$	646		$	271

The Company has certain international customers that are billed in foreign currencies. To mitigate the volatility related to fluctuations in the foreign exchange rates for accounts receivable denominated in foreign currencies, the Company enters into foreign currency forward contracts. As of ~~March 31,~~June 30, 2021, the Company had a foreign currency forward contract outstanding with a notional amount totaling ~~314~~1,129 Euros maturing in the ~~second~~third quarter of 2021. As of December 31, 2020, 0 foreign currency forward contracts were outstanding.

The Company’s foreign currency forward contracts described above economically hedged certain risks but were not designated as hedges for financial reporting purposes, and accordingly, all changes in the fair value of the derivative instruments were recorded as unrealized foreign currency transaction gains or losses and were included in the condensed consolidated statements of ~~income~~operations and comprehensive (loss) income as a component of other income (expense). The Company records derivative instruments in the condensed consolidated balance sheet at their fair values. As of ~~March 31,~~June 30, 2021, ~~and~~the Company recorded an asset of $8relating to outstanding foreign currency forward contracts. As of December 31, 2020 the Company recorded 0 asset relating to outstanding foreign currency forward contracts. As of ~~March 31,~~June 30, 2021 and December 31, 2020, the Company recorded 0 liability relating to outstanding foreign currency forward contracts.

The Company also faces exposure to foreign currency exchange rate fluctuations, as a certain portion of its expenses are denominated in currencies other than U.S. ~~Dollars.~~dollars. In certain instances, the Company utilizes forward contracts to hedge against foreign currency fluctuations. These contracts are used to minimize foreign gains or losses, as the gains or losses on the derivative are intended to offset the losses or gains on the underlying exposure. The Company does not engage in foreign currency speculation.

The Company designed its foreign currency risk management strategy principally to mitigate the potential financial impact of changes in the value of transactions and balances denominated in foreign currencies resulting from changes in foreign currency exchange rates. The Company may enter into cash flow hedges that utilize foreign currency forward contracts to hedge specific forecasted transactions of its foreign subsidiaries with the goal of protecting its budgeted expenses against foreign currency exchange rate changes compared to its budgeted rates.

During the six months ended June 30, 2020, the Company entered into a cash flow hedge with a notional amount of 8,500 AUD to hedge certain Australian dollar cash flows incurred during the second quarter of 2020. During the three months ended ~~March 31,~~June 30, 2020, the Company ~~entered into two~~settled this cash flow ~~hedges~~hedge, reclassifying a gain from other comprehensive (loss) income of $225. The full amount of the fair value of this derivative on the settlement date of $888 was recognized as $67 cost of goods sold, $537 research and development expense and $284 selling, general and administrative expense in the condensed consolidated statement of comprehensive (loss) income.

At June 30, 2020, the Company had one outstanding cash flow hedge with a notional ~~amounts~~amount of ~~8,500 AUD and~~ 5,000 AUD to hedge certain Australian ~~Dollar~~dollar cash flows incurred during the ~~second and~~ third ~~quarters~~quarter of ~~2020, respectively.~~2020. As the cash flows which were hedged had not yet occurred, the Company recognized ~~their~~the change in fair value of $396 for the three months ended June 30, 2020 and the full fair value of ~~$356~~$527 for the six months ended June 30, 2020 as accumulated other comprehensive income in the accompanying condensed consolidated statement of stockholders’ ~~equity for the three months ended March 31, 2020.~~equity. The Company did not have any cash flow hedges outstanding as of ~~March 31,~~June 30, 2021 and December 31, 2020.

The Company’s provision for (benefit from) income taxes was $3,182 and $887 for the three months ended June 30, 2021 and 2020, respectively. The change in the provision for (benefit from) income taxes was primarily due to changes in the jurisdictional mix of earnings period over period.

The Company’s effective income tax rate was ~~28.8%~~68.3% and ~~115.4%~~80.8% for the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020, respectively. The provision for (benefit from) income taxes was ~~$2,326~~$5,508 and ~~$(8,719)~~$(7,832) for the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020, respectively. The change in the provision for (benefit from) income taxes was primarily due to a discrete tax benefit of $9,310 recorded induring the ~~three~~six months ended ~~March 31, 2020~~June 30, 2021 associated with the enactment of the CARES Act. The change in the provision for (benefit from) income taxes was also impacted by changes in the jurisdictional mix of earnings period over period.

The ~~effective~~provision for (benefit from) income ~~tax rate~~taxes for the three and six months ended ~~March 31,~~June 30, 2021 and 2020 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 tax credits, foreign tax credits, the valuation allowance maintained against certain deferred tax assets and withholding taxes.

The aggregate principal amount of debt outstanding as of ~~March 31,~~June 30, 2021 and December 31, 2020 consisted of the following:

Current and non-current debt obligations reflected in the condensed consolidated balance sheets as of ~~March 31,~~June 30, 2021 and December 31, 2020 consisted of the following:

	March 31,			December 31,			June 30,			December 31,
	2021			2020			2021			2020
Current liabilities:
Term loan	$	9,775		$	9,775		$	3,000		$	9,775
Revolving credit facility		6,500			6,500			6,500			6,500
Current portion of principal payment obligations		16,275			16,275			9,500			16,275
Unamortized debt issuance costs, current portion		(1,068	)		(1,104	)		(1,082	)		(1,104	)
Current portion of long-term debt, net of unamortized debt issuance costs	$	15,207		$	15,171		$	8,418		$	15,171
Non-current liabilities:
Term loan	$	277,475		$	278,225		$	276,725		$	278,225
Unamortized debt issuance costs, non-current portion		(1,900	)		(2,140	)		(1,572	)		(2,140	)
Long-term debt, net of current portion and unamortized debt issuance costs	$	275,575		$	276,085		$	275,153		$	276,085

As of ~~March 31,~~June 30, 2021, aggregate minimum future principal payments of the Company’s debt are summarized as follows:

Year Ending December 31,
2021	$	15,525	$	8,000
2022		3,000		3,000
2023		275,225		275,225
Thereafter		—		—
	$	293,750	$	286,225

On December 20, 2016, the Company entered into a credit agreement with JPMorgan Chase Bank, N.A., as administrative agent, various lenders and JPMorgan Chase Bank, N.A. and Barclays Bank PLC providing for (i) a term loan facility of $300,000 and (ii) a revolving credit facility of up to $25,000 in revolving credit loans and letters of credit.

As of ~~March 31,~~June 30, 2021 and December 31, 2020, ~~$287,250~~$279,725 and $288,000 in principal amount, respectively, were outstanding under the term loan facility (the “Term Loans”). As of ~~March 31,~~June 30, 2021 and December 31, 2020, the Company had outstanding borrowings under the revolving credit facility of $6,500. As of ~~March 31,~~June 30, 2021 and December 31, 2020, the Company had also used ~~$1,513~~$1,503 and $1,454 of available credit under the revolving credit facility for two stand-by letters of credit, one which serves as collateral to one of the Company’s customers pursuant to a contractual performance guarantee and one which serves as collateral for operating leases in Australia. In addition, the Company may, subject to certain conditions, including the consent of the administrative agent and the institutions providing such increases, increase the facilities by an unlimited amount so long as the Company is in compliance with specified leverage ratios, or otherwise by up to $70,000.

Borrowings under the facilities bear interest at a floating rate, which can be either a Eurodollar rate plus an applicable margin or, at the Company’s option, a base rate (defined as the highest of (x) the JPMorgan Chase, 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 term loan facility 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 applicable margin for borrowings under the revolving credit facility is 1.75% per annum for Eurodollar rate loans and 0.75% per annum for base rate loans, subject to reduction based on the Company’s maintaining specified net leverage ratios. The interest rates payable under the facilities are 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 will be 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 is effected prior to the end of the applicable interest period. As of ~~March~~June 30, 2021 and December 31, ~~2021,~~2020, the interest rate on the Term Loans was 5.00% per annum, which was based on a three-month and six-month Eurodollar rate, respectively, at the applicable floor of 1.00% per annum plus the applicable margin of 4.00% per annum for Eurodollar rate loans. As of December 31, 2020, the interest rate on the Term Loans was 5.00% per annum, which was based on a one-month Eurodollar rate of 1.00% per annum plus the applicable margin of 4.00% per annum for Eurodollar rate loans. As of March 31,June 30, 2021, the interest rate on the revolving credit facility was 2.01% per annum, which was based on a ~~one-month~~six-month Eurodollar rate of 0.26% per annum plus the applicable margin of 1.75% per annum for Eurodollar rate loans. As of December 31, 2020, the interest rate on the revolving credit facility was 2.12% per annum, which was based on the ~~one-month~~six-month Eurodollar rate of 0.37% per annum plus the applicable margin of 1.75% per annum for Eurodollar rate loans.

Upon entering into the term loan facility, the Company incurred debt issuance costs of $7,811, which were initially recorded as a reduction of the debt liability and are amortized to interest expense using the effective interest method from the issuance date of the Term Loan until the maturity date. Principal payments of $7,525 and $750 were made during the three months ended June 30, 2021 and 2020, respectively, and principal payments of $8,275 and $1,500 were made during the six months ended June 30, 2021 and 2020, respectively, under the term loan ~~facility during each of the three months ended March 31, 2021 and 2020.~~facility. No principal payments were made under the revolving credit facility during the three and six months ended ~~March 31,~~June 30, 2021. Interest expense for the Term Loan and revolving credit facility, including the amortization of debt issuance costs, totaled ~~$3,869~~$3,933 and ~~$4,448~~$4,026 for the three months ended ~~March 31,~~June 30, 2021 and 2020, respectively and totaled $7,802 and $8,474 for the six months ended June 30, 2021 and 2020, respectively.

The revolving credit facility also requires payment of quarterly commitment fees at a rate of 0.25% per annum on the difference between committed amounts and amounts actually borrowed under the facility and customary letter of credit fees. For the three months ended ~~March 31,~~June 30, 2021 and 2020, interest expense related to the fee for the unused amount of the revolving credit facility totaled $11 and $15, respectively and for the six months ended June 30, 2021 and 2020, interest expense related to the fee for the unused amount of the revolving credit facility totaled $22 and $30, respectively.

The Term Loans mature on December 20, 2023, and the revolving credit facility matures on December 20, 2021. The Term Loans are subject to amortization in equal quarterly installments, which commenced on March 31, 2017, of principal in an annual aggregate amount equal to 1.0% of the original principal amount of the Term Loans of $300,000, with the remaining outstanding balance payable at the date of maturity.

Voluntary prepayments of principal amounts outstanding under the term loan facility 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 for any funding losses and expenses incurred as a result of the prepayment. Prior to the revolving credit facility maturity date, funds borrowed under the revolving credit facility may be borrowed, repaid and reborrowed, without premium or penalty.

In addition, the Company is required to make mandatory prepayments under the facilities with respect to (i) 100% of the net cash proceeds from certain asset dispositions (including casualty and condemnation events) by the Company or certain of its subsidiaries, subject to certain exceptions and reinvestment provisions, (ii) 100% of the net cash proceeds from the issuance or incurrence of any additional debt by the Company or certain of its subsidiaries, subject to certain exceptions, and (iii) 50% of the Company’s excess cash flow, as defined in the credit agreement, subject to reduction upon its achievement of specified performance targets. In accordance with these provisions, a mandatory early prepayment of $6,775 was paid by the Company on April 2, 2021. This amount was included in the current portion of long-term debt, net of unamortized debt issuance costs on the condensed consolidated balance ~~sheets~~sheet as of ~~March 31, 2021 and~~ December 31, 2020.

The facilities are secured by, among other things, a first priority security interest, subject to permitted liens, in substantially all of the Company’s assets and all of the assets of certain of its subsidiaries and a pledge of certain of the stock of certain of its subsidiaries, in each case subject to specified exceptions. The facilities contain customary affirmative and negative covenants, including certain restrictions on the Company’s ability to pay dividends, and, with respect to the revolving credit facility, a financial covenant requiring the Company to maintain a specified total net leverage ratio in the event that on the last day of any fiscal quarter the Company has utilized more than 30% of its borrowing capacity under the facility. The Company was in compliance with all covenants as of ~~March 31,~~June 30, 2021 and December 31, 2020.

On July 1, 2015, the Company entered into a commercial mortgage loan agreement in the amount of $7,950 (the “Mortgage Loan”). Borrowings under the Mortgage Loan bore interest at a rate of 3.5% per annum and were repayable in 60 monthly installments of $46, consisting of principal and interest based on a 20-year amortization schedule. The remaining amount of unpaid principal under the Mortgage Loan was paid on the maturity date of July 1, 2020 utilizing the Company’s revolving credit facility. Upon entering into the Mortgage Loan, the Company incurred debt issuance cost of $45, which was initially recorded as a direct deduction from the debt liability and was ~~being~~ amortized to interest expense using the effective interest method from the issuance date of the loan until the maturity date.

The Mortgage Loan was paid on the maturity date of July 1, 2020, utilizing the Company’s revolving credit facility. The Company made principal payments under the Mortgage Loan of $80 and $160 during the three and six months ended ~~March 31, 2020.~~June 30, 2020, respectively. Interest expense, including the amortization of debt issuance costs, totaled $60 and $120 during the three and six months ended ~~March 31, 2020.~~June 30, 2020, respectively.

In connection with special dividends previously declared, the board of directors also approved cash payments to be made to holders of the Company’s stock options, SARs and restricted stock units (“RSUs”) as equitable adjustments to the holders of such instruments in accordance with the provisions of the Company’s equity incentive plans. These equitable adjustment payments are equal to an amount per share multiplied by the net number of shares subject to outstanding equity awards after applying the treasury stock method. The below table provides details of these equitable adjustment payments:

				Equitable Adjustment Payments											Equitable Adjustment Payments
				Three Months Ended				Equitable Adjustment Liability(1)							Six Months Ended				Equitable Adjustment Liability(1)
Dividend Declaration Dates	Equitable Adjustment per share		Year of Final Vesting	March 31, 2021		March 31, 2020		As of March 31, 2021		As of December 31, 2020		Equitable Adjustment per share		Year of Final Vesting	June 30, 2021		June 30, 2020		As of June 30, 2021		As of December 31, 2020
November 30, 2017	$	0.5802	2021	$	10	$	38	$	20	$	30	$	0.5802	2021	$	40	$	121	$	4	$	30
May 10, 2017		1.1774	2021		1		33		30		31		1.1774	2021		53		171		—		31
December 27, 2016		2.3306	2020		2		93		—		2		2.3306	2020		2		276		—		2
June 17, 2016		0.5891	2020		—		12		—		—		0.5891	2020		—		54		—		—
Total				$	13	$	176	$	50	$	63				$	95	$	622	$	4	$	63

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. There were 0 repurchases made during the three and six months ended ~~March 31,~~June 30, 2021. During the three and six months ended ~~March 31,~~June 30, 2020, the Company repurchased 11 and 1,227 shares, respectively, for a cost of $33 and $3,031, including commissions. As of ~~March 31,~~June 30, 2021, $70,208 remained authorized for repurchases of the Company’s common stock under the stock repurchase program. The stock repurchase program has no expiration date and does not require usthe 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.

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 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 ~~21,793~~21,179 shares as of ~~March 31,~~June 30, 2021, of which ~~10,179~~10,456 shares remained available for future grant.

The following table summarizes the outstanding stock option activity and a summary of information related to stock options as of and for the ~~three~~six months ended ~~March 31,~~June 30, 2021:

	Number of Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term		Aggregate Intrinsic Value		Number of Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term		Aggregate Intrinsic Value
						(in years)									(in years)
Outstanding at January 1, 2021		7,120		$	8.01		4.88	$	9,367		7,120		$	8.01		4.88	$	9,367
Granted		24			8.94						77			8.96
Exercised		(156	)		3.68						(414	)		2.86
Forfeited		(86	)		10.12						(144	)		10.00
Outstanding at March 31, 2021		6,902		$	8.08		4.64	$	21,576
Options exercisable at March 31, 2021		6,391		$	7.81		4.37	$	20,593
Vested or expected to vest at March 31, 2021		6,892		$	8.08		4.63	$	21,568
Outstanding at June 30, 2021											6,639		$	8.30		4.41	$	16,800
Options exercisable at June 30, 2021											6,197		$	8.12		4.14	$	16,086
Vested or expected to vest at June 30, 2021											6,616		$	8.30		4.39	$	16,754

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 March 31,		Three Months Ended June 30,		Six Months Ended June 30,
	2021	2020	2021	2020	2021	2020
Risk-free interest rate	1.0%	0.7%	1.0%	0.4%	1.0%	0.4%-0.7%
Expected term (in years)	6.1	6.1	6.1	6.1	6.1	6.1
Expected volatility	38.2%	29.3%	38.2%	31.4%	38.2%	29.3%-31.4%
Expected dividend yield	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%

The weighted-average grant-date fair value of options granted during the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020 was $3.42 and ~~$0.66~~$1.15 per share, respectively. Cash proceeds received upon the exercise of options were ~~$574~~$1,187 and ~~$312~~$414 during the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020, respectively. The intrinsic value of stock options exercised during the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020 was ~~$805~~$2,496 and ~~$273,~~$373, 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.

A summary of RSU activity under the Company’s 2011 Stock Incentive Plan (the “2011 Plan”) and the 2017 Plan for the ~~three~~six months ended ~~March 31,~~June 30, 2021 is as follows:

	Number of Shares			Weighted- Average Grant Date Fair Value		Aggregate Fair Value		Number of Shares			Weighted- Average Grant Date Fair Value		Aggregate Fair Value
Unvested balance at January 1, 2021		4,231		$	5.43				4,231		$	5.43
Granted		669			9.14				756			9.15
Vested		(872	)		6.23	$	7,060		(1,133	)		5.93	$	9,392
Forfeited		(4	)		11.78				(212	)		4.81
Unvested balance at March 31, 2021		4,024		$	5.86
Unvested balance at June 30, 2021									3,642		$	6.08

The Company withheld ~~593~~744 and ~~111~~117 shares of common stock in settlement of employee tax withholding obligations due upon the vesting of RSUs during the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020, respectively.

During the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020, 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. The performance goals 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 may occur at any time during the three-year period.

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 Months Ended March 31,		Six Months Ended June 30,
	2021	2020	2021	2020
Risk-free interest rate	0.2%	1.2%	0.2%	1.2%
Volatility	78.6%	70.0%	78.6%	70.0%
Dividend yield	0.0%	0.0%	0.0%	0.0%
Cost of equity	12.0%	11.0%	12.0%	11.0%

A summary of PSU activity for the ~~year three~~six months ended ~~March 31,~~June 30, 2021 is as follows:

	Number of Shares			Weighted- Average Grant Date Fair Value		Aggregate Fair Value		Number of Shares			Weighted- Average Grant Date Fair Value		Aggregate Fair Value
Unvested balance at January 1, 2021		737		$	3.22				737		$	3.22
Granted		442			7.89				442			7.89
Vested		(492	)		3.22	$	4,023		(737	)		3.22	$	6,449
Forfeited		—			—				—			—
Unvested balance at March 31, 2021		687		$	6.23
Unvested balance at June 30, 2021									442		$	7.89

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. During the ~~three~~six months ended ~~March 31,~~June 30, 2021, 20 SARs were exercised with a fair value of ~~$6.75.~~$6.75 per share. As of ~~March 31,~~June 30, 2021, 200 outstanding and fully vested SARs were exercisable with a weighted-average fair value of ~~$3.53~~$3.23 per SAR. The fair value of the SAR liability as of ~~March 31,~~June 30, 2021 and December 31, 2020 was ~~$705~~$646 and $493, respectively, (see Note 7) and was included in accrued expenses and other current liabilities in the accompanying condensed consolidated balance sheets.

Stock-based compensation expense related to stock options, RSUs, SARs and PSUs for the three and six months ended ~~March 31,~~June 30, 2021 and 2020 was classified in the condensed consolidated statements of ~~income~~operations and comprehensive (loss) income as follows:

	Three Months Ended March 31,				Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020		2021		2020
Cost of revenue	$	33	$	31	$	33	$	39	$	66	$	70
Research and development expenses		871		437		543		650		1,414		1,087
Selling, general and administrative expenses		2,549		1,969		3,518		2,890		6,067		4,859
Total stock-based compensation	$	3,453	$	2,437	$	4,094	$	3,579	$	7,547	$	6,016

~~During the three months ended March 31, 2021 and 2020, the~~The Company recognized stock-based compensation ~~of $347~~expense for the three and ~~$(65), respectively,~~six months ended June 30, 2021 and 2020 in the condensed consolidated balance sheet as ~~a change in fair value of the outstanding SAR liability and recognized $3,106 and $2,502, respectively, as additional paid-in capital.~~follows:

As of ~~March 31,~~June 30, 2021, there was ~~$27,409~~$23,345 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 ~~2.09~~2.62 years.

Basic and diluted net (loss) income per share attributable to common stockholders was calculated as follows:

	Three Months Ended March 31,				Three Months Ended June 30,						Six Months Ended June 30,
	2021		2020		2021			2020			2021		2020
Numerator:
Net income attributable to common stockholders, basic and diluted	$	5,749	$	1,162
Net (loss) income attributable to common stockholders, basic and diluted					$	(3,193	)	$	(3,028	)	$	2,556	$	(1,866	)
Denominator:
Weighted-average shares used to compute net income per share attributable to common stockholders, basic		84,242		83,990
Weighted-average shares used to compute net (loss) income per share attributable to common stockholders, basic						85,036			83,068			84,641		83,505
Dilutive effect of stock options		1,978		885		—			—			2,003		—
Dilutive effect of restricted stock units		2,348		134		—			—			2,369		—
Weighted-average shares used to compute net income per share attributable to common stockholders, diluted		88,568		85,009
Net income per share attributable to common stockholders:
Weighted-average shares used to compute net (loss) income per share attributable to common stockholders, diluted						85,036			83,068			89,013		83,505
Net (loss) income per share attributable to common stockholders:
Basic	$	0.07	$	0.01	$	(0.04	)	$	(0.04	)	$	0.03	$	(0.02	)
Diluted	$	0.06	$	0.01	$	(0.04	)	$	(0.04	)	$	0.03	$	(0.02	)

The following potential common shares, presented based on amounts outstanding at each period end, were excluded from the computation of diluted net (loss) income per share attributable to common stockholders for the periods presented because including them would have been anti-dilutive:

The Company disaggregates its revenue by product and service in the condensed consolidated statements of ~~income~~operations and comprehensive (loss) income. 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 March 31,				Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020		2021		2020
North America:
United States	$	36,912	$	29,440	$	23,951	$	29,349	$	60,863	$	58,789
Canada		26,238		4,512		24,550		4,229		50,788		8,742
Total North America		63,150		33,952		48,501		33,578		111,651		67,531
Europe, Middle East and Africa:		6,353		14,098		6,577		7,350		12,931		21,446
Asia-Pacific:
Australia		23,398		21,704		20,800		26,255		44,198		47,959
Other		6,801		11,484		8,893		10,385		15,694		21,870
Total Asia-Pacific		30,199		33,188		29,693		36,640		59,892		69,829
Latin America		4,575		2,385		7,959		5,782		12,533		8,167
Total revenue⁽¹⁾	$	104,277	$	83,623	$	92,730	$	83,350	$	197,007	$	166,973

The Company also disaggregates its revenue based on product line summarized as follows:

	Three Months Ended March 31,				Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020		2021		2020
Product revenue:
Wireless	$	39,688	$	20,657	$	33,323	$	15,510	$	73,011	$	36,167
Fixed telco		14,885		17,932		16,137		23,819		31,022		41,751
Cable		39,225		35,169		31,009		32,799		70,234		67,968
Total product revenue		93,798		73,758		80,469		72,128		174,267		145,886
Service revenue:
Wireless		591		1,774		1,684		1,074		2,275		2,848
Fixed telco		1,606		250		1,043		301		2,649		551
Cable		8,282		7,841		9,534		9,847		17,816		17,688
Total service revenue		10,479		9,865		12,261		11,222		22,740		21,087
Total revenue	$	104,277	$	83,623	$	92,730	$	83,350	$	197,007	$	166,973

As of ~~March 31,~~June 30, 2021 and December 31, 2020, the Company had short-term capitalized contract costs of ~~$98~~$92 and $95, respectively, which are included in prepaid expenses and other current assets and had long-term capitalized contract costs of ~~$56~~$63 and $70, respectively, which are included in other assets in the accompanying condensed consolidated balance sheets. During the three months ended ~~March 31,~~June 30, 2021 and 2020, amortization expense associated with capitalized contract costs was ~~$23~~$29 and ~~$253,~~$196, respectively, and during the six months ended June 30, 2021 and 2020 was $52 and $449, respectively, all of which was recorded to selling, general and administrative expenses in the accompanying condensed consolidated statements of ~~income~~operations and comprehensive (loss) income.

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 above methodology. For the three and six months ended ~~March 31,~~June 30, 2021, the Company recognized ~~$7,010~~$4,969 and $11,979, respectively, of revenue that was included in deferred revenue as of December 31, 2020. For the three and six months ended ~~March 31,~~June 30, 2020, the Company recognized ~~$14,940~~$13,600 and $28,539, respectively, of revenue that was included in deferred revenue as of December 31, 2019.

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 ~~March 31,~~June 30, 2021 and December 31, 2020, the Company included contract assets of $6$288 and ~~$110,~~$771, respectively, which is netted with deferred revenue in the accompanying condensed consolidated balance sheets.

As of ~~March 31,~~June 30, 2021, the aggregate remaining amount of revenue expected to be recognized related to unsatisfied or partially unsatisfied performance obligations is ~~$25,121,~~$25,552, which consists of deferred revenue. The Company expects approximately ~~88%~~79% of this amount to be recognized in the next twelve months with the remaining amounts to be recognized over the next two to five years.

The Company’s customary payment terms are generally 90 days or less. If the Company provides extended payment terms that represent a significant financing component, the Company adjusts the amount of promised consideration for the time value of money using an appropriate discount rate and recognizes interest income separate from the revenue recognized on contracts with customers. During the three months ended ~~March 31,~~June 30, 2021 and 2020, the Company recorded $6interest income of $4 and ~~$34~~$13, respectively, inand during the six months ended June 30, 2021 and 2020, the Company recorded interest income of $8 and $47, respectively, all of which were recorded in the in the condensed consolidated statements of ~~income~~operations and comprehensive (loss) income.

The Company operates as 1 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 President and 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.

	March 31, 2021		December 31, 2020		June 30, 2021		December 31, 2020
United States	$	19,792	$	20,988	$	18,657	$	20,988
China		2,984		2,986		2,722		2,986
Australia		2,663		2,849		2,434		2,849
Other		1,800		2,057		1,658		2,057
Total property and equipment, net	$	27,239	$	28,880	$	25,471	$	28,880

Rongke Xie, who serves as Deputy General Manager of Guangzhou Casa Communication Technology LTD (“Casa China”), a subsidiary of the Company, is the sister of Lucy Xie, the Company’s Senior Vice President of Operations and a member of the Company’s board of directors. Casa China paid Rongke Xie ~~$33~~$150 and ~~$22~~$122 in total compensation induring the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020, respectively, for her services as an employee.

In March 2020, February 2019 and June 2018, the Company granted to Rongke Xie 90, 8 and 5 RSUs, respectively, which vest over four annual periods. The grant-date fair value of the awards totaled $400, which will be recorded as stock-based compensation expense over the vesting period of the awards. During the three months ended ~~March 31,~~June 30, 2021 and 2020, the Company recognized selling, general and administrative expenses of $25 and ~~$13~~$24 related to these awards and during the six months ended June 30, 2021 and 2020, the Company recognized selling, general and administrative expenses of $50 and $37 related to these awards.

The Company has, in the ordinary course of business, agreed to defend and indemnify certain customers against third-party claims asserting (i) infringement of certain intellectual property rights, which may include patents, copyrights, trademarks or trade ~~secrets.~~secrets, and (ii) certain other harms caused by the acts or omissions on 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 ~~March 31,~~June 30, 2021 and December 31, 2020, the Company had not experienced any losses related to these indemnification obligations and 0 material claims were outstanding where a contingent loss was considered to be probable or reasonably estimable. The Company does not expect significant claims related to these indemnification obligations and, consequently, concluded that the fair value of these obligations is negligible, and no related liabilities were recorded in its condensed consolidated financial statements.

The complete response to this section regarding legal proceedings is incorporated by reference herein to Part II Item I in this 10-Q.

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion of our financial condition and results of operations should be read together with our condensed consolidated financial statements and related notes and other financial information included elsewhere in this Quarterly Report on Form 10-Q. The following discussion contains forward-looking statements that reflect our plans, estimates and beliefs. Our actual results could differ materially from those discussed in the forward-looking statements. Factors that could cause or contribute to these differences include those discussed below and elsewhere in this Quarterly Report on Form 10-Q, particularly in the section titled “Risk Factors.” For discussion comparing the period ended ~~March 31,~~June 30, 2020 ~~to March 31,~~and June 30, 2019, please refer to our Quarterly Report on form 10-Q, filed with the SEC on ~~May 1,~~July 31, 2020.

Our solutions are conceived, designed and built to enable our CSP customers to offer high bandwidth data services to their subscribers, and to transform their networks to meet the growing demand for bandwidth and the introduction of new services. We offer physical, virtual and cloud-native 5G ~~infrastructure~~broadband and customer premise networking equipment for public and private high-speed data and multi-service communications networks. Our core and edge ~~infrastructure~~broadband technology enables CSPs and enterprises to cost-effectively and dynamically increase data network speed for their subscribers, add bandwidth capacity and new services, reduce network complexity, and reduce operating and capital expenditures.

We offer scalable solutions that can meet the evolving bandwidth needs of our customers and their subscribers. Our first installation in a service provider’s network frequently involves deploying our broadband products in only a portion of the provider’s network and, for our cable products, with only a fraction of the capacity of our products enabled at the time of initial installation. Over time, our customers have generally expanded the use of our solutions to other areas of their networks to extend network coverage or increase network capacity.

Our solutions are commercially deployed in over 70 countries by more than 475 customers, including regional service providers as well as some of the world’s largest Tier 1 CSPs, serving millions of subscribers.

The ~~emergence of the coronavirus disease in 2019, or~~ COVID-19 ~~around the world, and particularly in the United States and China,~~pandemic and the accompanying responses of governments and businesses to the pandemic continue to present various risks to us, not all of which we are able to fully evaluate or ~~even~~ foresee at the current time. While the COVID-19 pandemic did not significantly adversely affect our financial results, business operations or liquidity during the three and six months ended ~~March 31,~~June 30, 2021, economic and health conditions in the United States and across most of the globe changed rapidly ~~throughout 2020,~~during the period and are continuing to change ~~into 2021.~~after the end of the quarter. Globally, ~~to date,~~ all aspects of our business remain fully ~~operational, and our work from home contingency plans have been implemented and are operating successfully.~~operational. The pandemic has ~~resulted in~~led to increased demand for certain of our products, ~~and~~ resulting in increased order volumes that have created additional pressure on our supply chain. ~~To date, while~~In addition, certain of our products utilize components, for which there has been increased global demand. As a result, we have begun to see shortages of supply that have increased the ~~increased demand has not resulted~~likelihood of an adverse impact on our future revenue and gross margins and ability to fill orders for customers in ~~any material delays to our production cycle, we~~a timely manner. We continue to work with our supply chain and contract manufacturers, ~~in an effort~~as well as our customers, to ~~ensure continued availability~~minimize the possible extent of ~~all anticipated inventory requirements.~~such impacts. However, ~~we cannot~~ at this time we are neither able to estimate the extent of these impacts nor predict whether ~~or to what extent,~~ our efforts to minimize or contain them will be successful. Additionally, we saw decreases in certain operating expenses, such as travel and trade show expense, during the year ended December 31, 2020 and the three months ended March 31, 2021 due to the COVID-19 pandemic that we cannot ensure will be maintained. We intend to continue to monitor our business very closely for any effects of COVID-19 for as long as ~~necessary on an ongoing basis.~~necessary.

~~In addition,~~Additionally, we saw decreases in ~~response~~certain operating expenses, such as travel and trade show expense, and benefited from certain U.S. government tax relief measures, discussed further below, during the year ended December 31, 2020, and the three and six months ended June 30, 2021, due to the COVID-19 pandemic that we expect to gradually diminish as the various geographies in which we operate begin to recover from the pandemic

The Coronavirus Aid, Relief and Economic Security Act (“CARES Act”) was signed into law on March 27, 2020. The CARES Act, among other things, includes tax provisions relating to refundable payroll tax credits, deferment of employer’s ~~social security~~Social Security payments, net operating loss utilization and carryback periods, modifications to the net interest deduction limitations and technical corrections to tax depreciation methods for qualified improvement property (QIP). For the three and six months ended ~~March 31,~~June 30, 2021, we recognized a reduction to cost of goods sold of $0.3 million and $0.6 million, respectively and a reduction in operating expenses of $2.1 million and $4.3 million, respectively, for a payroll tax credit under the CARES ~~Act of $0.3 million and $2.1 million, respectively.~~Act. For the three and six months ended ~~March 31,~~June 30, 2020, we recognized an income tax benefit of $9.3 million, respectively (see Note 9 to our accompanying financial statements). We will continue to evaluate the impact of the CARES Act on our financial position, results of operations, and cash flows.

Due to the above circumstances and as described generally in this Quarterly Report on Form 10-Q, our results of operations for the three and six months ended ~~March 31,~~June 30, 2021 are not necessarily indicative of the results to be expected in future periods. Management cannot predict the full impact of the COVID-19 pandemic on our sales channels, supply chain,

manufacturing and distribution, or on economic conditions generally, including the effects on our current and potential customers, who may ~~temporarily accelerate or~~ curtail spending on investments in current and/or new technologies, delay new equipment evaluations and trials, and possibly delay payments based on liquidity concerns, all of which could have a material impact on our business in the future. Similarly, our supply chain and our contract manufacturers could be affected, which could cause disruptions to our ability to meet customer ~~demand. Although~~demand or delivery schedules. For the three and six months ended June 30, 2021, we ~~have not been materially~~did see certain delays in supply chain that adversely impacted ~~to date, we cannot predict the extent to which this may impact our future results~~a small number of ~~operations.~~delivery schedules. If COVID-19 were to have such effects in the future, there would likely be a material adverse impact on our financial results, liquidity and capital resource needs. ~~Thus,~~This uncertainty makes it challenging for management to estimate the ~~ultimate extent~~future performance of our businesses, particularly in the ~~effects~~near to medium term. However, the impact of ~~the~~ COVID-19 ~~pandemic~~could have a material adverse impact on our ~~business is highly uncertain and dependent upon future developments, and such effects could exist for an extended period~~results of ~~time even after~~operations in the ~~pandemic ends.~~near to medium term.

The following tables set forth our consolidated results of operations in dollar amounts and as percentage of total revenue for the periods shown:

	Three Months Ended March 31,						Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020			2021			2020
	(in thousands)						(in thousands)						(in thousands)
Revenue:
Product	$	93,798		$	73,758		$	80,469		$	72,128		$	174,267		$	145,886
Service		10,479			9,865			12,261			11,222			22,740			21,087
Total revenue		104,277			83,623			92,730			83,350			197,007			166,973
Cost of revenue⁽¹⁾:
Cost of revenue⁽¹⁾:
Product		47,026			39,644			46,117			39,011			93,143			78,655
Service		1,211			1,326			1,098			1,209			2,309			2,535
Total cost of revenue		48,237			40,970			47,215			40,220			95,452			81,190
Gross profit		56,040			42,653			45,515			43,130			101,555			85,783
Operating expenses:
Research and development⁽¹⁾		21,606			21,211
Selling, general and administrative⁽¹⁾		21,880			24,991
Research and development⁽¹⁾								20,295			20,688			41,901			41,899
Selling, general and administrative⁽¹⁾								21,583			21,110			43,463			46,101
Total operating expenses		43,486			46,202			41,878			41,798			85,364			88,000
Income (loss) from operations		12,554			(3,549	)		3,637			1,332			16,191			(2,217	)
Other income (expense), net		(4,479	)		(4,008	)		(3,648	)		(3,473	)		(8,127	)		(7,481	)
Income (loss) before provision for (benefit from) income taxes		8,075			(7,557	)
(Loss) income before provision for (benefit from) income taxes								(11	)		(2,141	)		8,064			(9,698	)
Provision for (benefit from) income taxes		2,326			(8,719	)		3,182			887			5,508			(7,832	)
Net income	$	5,749		$	1,162
Net (loss) income							$	(3,193	)	$	(3,028	)	$	2,556		$	(1,866	)

	Three Months Ended March 31,				Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020		2021		2020
	(in thousands)				(in thousands)				(in thousands)
Cost of revenue	$	33	$	31	$	33	$	39	$	66	$	70
Research and development expense		871		437		543		650		1,414		1,087
Selling, general and administrative expense		2,549		1,969		3,518		2,890		6,067		4,859
Total stock-based compensation expense	$	3,453	$	2,437	$	4,094	$	3,579	$	7,547	$	6,016

	Three Months Ended March 31,						Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020			2021			2020
	(as a percentage of total revenue)						(as a percentage of total revenue)						(as a percentage of total revenue)
Revenue:
Product		90.0	%		88.2	%		86.8	%		86.5	%		88.5	%		87.4	%
Service		10.0			11.8			13.2			13.5			11.5			12.6
Total revenue		100.0			100.0			100.0			100.0			100.0			100.0
Cost of revenue:
Product		45.1			47.4			49.7			46.8			47.3			47.1
Service		1.2			1.6			1.2			1.5			1.2			1.5
Total cost of revenue		46.3			49.0			50.9			48.3			48.5			48.6
Gross profit		53.7			51.0			49.1			51.7			51.5			51.4
Operating expenses:
Research and development		20.7			25.4			21.9			24.8			21.3			25.1
Selling, general and administrative		21.0			29.9			23.3			25.3			22.1			27.6
Total operating expenses		41.7			55.3			45.2			50.1			43.3			52.7
Income (loss) from operations		12.0			(4.2	)		3.9			1.6			8.2			(1.3	)
Other income (expense), net		(4.3	)		(4.8	)		(3.9	)		(4.2	)		(4.1	)		(4.5	)
Income (loss) before provision for (benefit from) income taxes		7.7			(9.0	)
(Loss) income before provision for (benefit from) income taxes								—			(2.6	)		4.1			(5.8	)
Provision for (benefit from) income taxes		2.2			(10.4	)		3.4			1.1			2.8			(4.7	)
Net income		5.5	%		1.4	%
Net (loss) income								(3.4	)%		(3.6	)%		1.3	%		(1.1	)%

Percentages in the table above are based on actual values. As a result, some totals may not sum due to rounding.

Three Months Ended ~~March 31,~~June 30, 2021 Compared to the Three Months Ended ~~March 31,~~June 30, 2020

Three Months Ended March 31,

2021

2020

Change

Amount

% of Total

Amount

% of Total

Amount

%

(dollars in thousands)

Revenue:

Product

$
93,798

90.0
%

$
73,758

88.2
%

$
20,040

27.2
%
Service

10,479

10.0
%

9,865

11.8
%

614

6.2
%
Total revenue

$
104,277

100.0
%

$
83,623

100.0
%

$
20,654

24.7
%
Revenue by geographic region:

North America

$
63,150

60.5
%

$
33,952

40.5
%

$
29,198

86.0
%
Europe, Middle East and Africa

6,353

6.1
%

14,098

16.9
%

(7,745
)

(54.9
)%
Asia-Pacific

30,199

29.0
%

33,188

39.7
%

(2,989
)

(9.0
)%
Latin America

4,575

4.4
%

2,385

2.9
%

2,190

91.8
%
Total revenue

$
104,277

100.0
%

$
83,623

100.0
%

$
20,654

24.7
%

Three Months Ended March 31,

Change

2021

2020

Amount

%

Product revenue:

Wireless

$
39,688

$
20,657

$
19,031

92.1
%
Fixed telco

14,885

17,932

(3,047
)

(17.0
)%
Cable

39,225

35,169

4,056

11.5
%
Total product revenue

93,798

73,758

20,040

27.2
%
Service revenue:

Wireless

591

1,774

(1,183
)

(66.7
)%
Fixed telco

1,606

250

1,356

542.4
%
Cable

8,282

7,841

441

5.6
%
Total service revenue

10,479

9,865

614

6.2
%
Total revenue

$
104,277

$
83,623

$
20,654

24.7
%

	Three Months Ended June 30,
	2021					2020					Change
	Amount		% of Total			Amount		% of Total			Amount			%
	(dollars in thousands)
Revenue:
Product	$	80,469		86.8	%	$	72,128		86.5	%	$	8,341			11.6	%
Service		12,261		13.2	%		11,222		13.5	%		1,039			9.3	%
Total revenue	$	92,730		100.0	%	$	83,350		100.0	%	$	9,380			11.3	%
Revenue by geographic region:
North America	$	48,501		52.3	%	$	33,578		40.3	%	$	14,923			44.4	%
Europe, Middle East and Africa		6,577		7.1	%		7,350		8.8	%		(773	)		(10.5	)%
Asia-Pacific		29,693		32.0	%		36,640		44.0	%		(6,947	)		(19.0	)%
Latin America		7,959		8.6	%		5,782		6.9	%		2,177			37.7	%
Total revenue	$	92,730		100.0	%	$	83,350		100.0	%	$	9,380			11.3	%

	Three Months Ended June 30,				Change
	2021		2020		Amount			%
Product revenue:
Wireless	$	33,323	$	15,510	$	17,813			114.8	%
Fixed telco		16,137		23,819		(7,682	)		(32.3	)%
Cable		31,009		32,799		(1,790	)		(5.5	)%
Total product revenue		80,469		72,128		8,341			11.6	%
Service revenue:
Wireless		1,684		1,074		610			56.8	%
Fixed telco		1,043		301		742			246.5	%
Cable		9,534		9,847		(313	)		(3.2	)%
Total service revenue		12,261		11,222		1,039			9.3	%
Total revenue	$	92,730	$	83,350	$	9,380			11.3	%

The increase in product revenue was primarily attributed to the continued increased demand for our wireless products, ~~as well as an increase in cable product revenue from~~including significantly increased sales to certain Tier 1 customers in the North America ~~region.~~region, partially offset by decreases in revenue from cable and fixed telco, the latter of which is a product line currently in a transition period, as we diversify our customer base and grow revenue from new fixed telco product offerings.

The increase in service revenue was primarily due to increased product revenues with attached support revenue, and also from new service agreements with certain large wireless customers.

	Three Months Ended March 31,				Change						Three Months Ended June 30,				Change
	2021		2020		Amount			%			2021		2020		Amount			%
	(dollars in thousands)										(dollars in thousands)
Cost of revenue:
Product	$	47,026	$	39,644	$	7,382			18.6	%	$	46,117	$	39,011	$	7,106			18.2	%
Service		1,211		1,326		(115	)		(8.7	)%		1,098		1,209		(111	)		(9.2	)%
Total cost of revenue	$	48,237	$	40,970	$	7,267			17.7	%	$	47,215	$	40,220	$	6,995			17.4	%

	Three Months Ended March 31,														Three Months Ended June 30,
	2021					2020					Change				2021					2020					Change
	Amount		Gross Margin			Amount		Gross Margin			Amount		Gross Margin (bps)		Amount		Gross Margin			Amount		Gross Margin			Amount		Gross Margin (bps)
	(dollars in thousands)														(dollars in thousands)
Gross profit:
Product	$	46,772		49.9	%	$	34,114		46.3	%	$	12,658		360	$	34,352		42.7	%	$	33,117		45.9	%	$	1,235		(320	)
Service		9,268		88.4	%		8,539		86.6	%		729		180		11,163		91.0	%		10,013		89.2	%		1,150		180
Total gross profit	$	56,040		53.7	%	$	42,653		51.0	%	$	13,387		270	$	45,515		49.1	%	$	43,130		51.7	%	$	2,385		(260	)

The increase in cost of product revenue was attributed to increased revenue. The gross margin ~~increase~~decrease was due to product mix, with sales of ~~software and other higher~~certain lower gross margin wireless products comprising a higher percentage of total revenue in the three months ended ~~March 31,~~June 30, 2021 as compared to the three months ended ~~March 31,~~June 30, 2020.

The decrease in cost of service revenue and increase in service gross ~~profit~~margin were primarily due to a decrease in utilization of third-party professional services.

	Three Months Ended March 31,						Change					Three Months Ended June 30,						Change
	2021			2020			Amount		%			2021			2020			Amount			%
	(dollars in thousands)											(dollars in thousands)
Research and development	$	21,606		$	21,211		$	395		1.9	%	$	20,295		$	20,688		$	(393	)		(1.9	)%
Percentage of revenue		20.7	%		25.4	%							21.9	%		24.8	%

The ~~increase~~decrease in research and development expense was primarily due to a ~~$0.2~~$0.9 million ~~increase~~decrease in purchases of research and development ~~materials, an~~materials. This decrease was partially offset by a $0.3 million increase ~~of $0.2 million~~ in professional services and a ~~$0.1~~$0.2 million increase in ~~facilities costs. These increases were partially offset by a $0.2 million decrease in~~ personnel costs, driven by an increase in headcount in 2021, which increased salaries and benefits by $1.5 million, and was partially offset by a reduction in payroll taxes due to a CARES Act credit of $1.3 million during the three months ended ~~March 31, 2021, offset by increased salaries and benefits of $1.1 million due to increased headcount in 2021 compared to 2020.~~ June 30, 2021.

The ~~decrease~~increase in selling, general and administrative expense was primarily driven by an increase of $0.3 million in trade show expenses in 2021 and a ~~decrease of~~ $0.8 million increase in personnel costs, which was driven by a $1.9 million decrease in commissions, a $0.9 million decrease in travel due to COVID-19, and a $0.8 million decrease in payroll taxes due to a CARES act credit during the three months ended March 31, 2021, partially offset by a $2.7$1.3 million increase in salaries and benefits due to increased headcount in 2021 compared to ~~2020. The~~2020 and an increase in stock-based compensation of $0.6 million in 2021, partially offset by a decrease of $0.3 million in commissions and a $0.8 million decrease in payroll taxes due to a CARES Act credit during the three months ended June 30, 2021. These increases in selling, general and administrative expense was ~~further driven~~partially offset by a ~~decrease of $1.1 million in professional services due to a reduction in audit and tax consulting fees, a $0.4 million decrease in trade show expenses due to COVID-19 and a $0.8~~$0.7 million decrease in depreciation expense as assets that became fully depreciated were not replaced.

	Three Months Ended March 31,						Change						Three Months Ended June 30,						Change
	2021			2020			Amount			%			2021			2020			Amount			%
	(dollars in thousands)												(dollars in thousands)
Other income (expense), net	$	(4,479	)	$	(4,008	)	$	(471	)		11.8	%	$	(3,648	)	$	(3,473	)	$	(175	)		5.0	%
Percentage of revenue		(4.3	)%		(4.8	)%								(3.9	)%		(4.2	)%

The change in other income (expense), net was primarily due to a ~~$0.9~~$0.7 million increase in foreign exchange losses due to fluctuations in the Australian dollar and the China Renminbi exchange rates and a ~~$0.3~~$0.2 million decrease in interest income due to lower interest rates, partially offset by a ~~$0.7~~$0.4 million increase in other income due to R&D grant income received in China and a $0.3 million decrease in interest expense due to decreases in both the outstanding principal balance and the interest rate on our term loan facility.

The change to the income tax provision for the three months ended ~~March 31,~~June 30, 2021 compared to the income tax provision for the three months ended June 30, 2020 was primarily due to changes in the jurisdictional mix of earnings period over period.

	Six Months Ended June 30,
	2021					2020					Change
	Amount		% of Total			Amount		% of Total			Amount			%
	(dollars in thousands)
Revenue:
Product	$	174,267		88.5	%	$	145,886		87.4	%	$	28,381			19.5	%
Service		22,740		11.5	%		21,087		12.6	%		1,653			7.8	%
Total revenue	$	197,007		100.0	%	$	166,973		100.0	%	$	30,034			18.0	%
Revenue by geographic region:
North America	$	111,651		56.6	%	$	67,531		40.5	%	$	44,120			65.3	%
Europe, Middle East and Africa		12,931		6.6	%		21,446		12.8	%		(8,515	)		(39.7	)%
Asia-Pacific		59,892		30.4	%		69,829		41.8	%		(9,937	)		(14.2	)%
Latin America		12,533		6.4	%		8,167		4.9	%		4,366			53.5	%
Total revenue	$	197,007		100.0	%	$	166,973		100.0	%	$	30,034			18.0	%

	Six Months Ended June 30,				Change
	2021		2020		Amount			%
Product revenue:
Wireless	$	73,011	$	36,167	$	36,844			101.9	%
Fixed telco		31,022		41,751		(10,729	)		(25.7	)%
Cable		70,234		67,968		2,266			3.3	%
Total product revenue		174,267		145,886		28,381			19.5	%
Service revenue:
Wireless		2,275		2,848		(573	)		(20.1	)%
Fixed telco		2,649		551		2,098			380.8	%
Cable		17,816		17,688		128			0.7	%
Total service revenue		22,740		21,087		1,653			7.8	%
Total revenue	$	197,007	$	166,973	$	30,034			18.0	%

The increase in product revenue was primarily attributed to continued increased demand for our wireless products, as well as an increase in cable product revenue from significantly increased sales to certain Tier 1 customers in the North America region. These increases were partially offset by a decrease in revenue from fixed telco, which is a product line currently in a transition period, as we diversify our customer base and increase revenue from new fixed telco product offerings.

The increase in service revenue was primarily due to increased product revenues with attached support revenue, and also from new service agreements with certain large wireless customers.

The increase in cost of product revenue was attributed to increased revenue. The product gross margin was consistent in the six months ended June 30, 2021 as compared to the six months ended June 30, 2020.

The decrease in cost of service revenue and increase in service gross margin were primarily due to a decrease in utilization of third-party professional services.

Research and development expense was consistent for the six months ended June 30, 2021 and 2020. Personnel costs remained consistent overall, however salaries and benefits increased $2.6 million in the six months ended June 30, 2021 due to increased headcount, offset by a reduction in payroll taxes due to a CARES Act credit of $2.6 million during the six months ended June 30, 2021. Professional services increased $0.3 million in the six months ended June 30, 2021 and allocated facilities and depreciation costs increased by $0.4 million driven by increased headcount. These increases were offset by a decrease of $0.7 million in purchases of R&D materials.

The decrease in selling, general and administrative expense was primarily driven by a decrease of $1.1 million in professional services due to a reduction in audit and tax consulting fees and a $1.5 million decrease in depreciation expense as assets that became fully depreciated were not replaced. Personnel costs remained overall consistent for the six months ended June 30, 2021 and 2020, with increases in salaries and benefits of $3.5 million, driven by increased headcount, and stock-based compensation of $1.2 million, offset by a $2.2 million decrease in commissions, a $0.9 million decrease in travel due to COVID-19, and a $1.6 million decrease in payroll taxes due to a CARES act credit during the six months ended June 30, 2021.

The change in other income (expense), net was primarily due to a $1.6 million increase in foreign exchange losses due to fluctuations in the Australian dollar and the China Renminbi exchange rates and a $0.5 million decrease in interest income due to lower interest rates, partially offset by a $0.4 million increase in other income due to R&D grant income received in China and a $1.0 million decrease in interest expense due to decreases in both the outstanding principal balance and the interest rate on our term loan facility.

The change to the income tax provision for the six months ended June 30, 2021 compared to the income tax benefit for the ~~three~~six months ended ~~March 31,~~June 30, 2020 was primarily due to a discrete tax benefit of $9.3 million recorded in the ~~three~~six months ended ~~March 31,~~June 30, 2020 associated with the enactment of the CARES Act. The change in the provision for (benefit from) income taxes was also impacted by changes in the jurisdictional mix of earnings period over period.

Since our inception, we have primarily funded our operations through issuances of shares of our convertible preferred stock, our ~~initial public offering~~long-term debt and cash flows from operations.

The following tables set forth our cash and cash equivalents and working capital as of ~~March 31,~~June 30, 2021 and December 31, 2020 and our cash flows for the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020:

	March 31, 2021		December 31, 2020		June 30, 2021		December 31, 2020
	(in thousands)				(in thousands)
Consolidated Balance Sheet Data:
Cash and cash equivalents	$	144,961	$	157,455	$	168,654	$	157,455
Working capital		257,357		251,573		263,884		251,573

As of ~~March 31,~~June 30, 2021, we had cash, cash equivalents and restricted cash of ~~$146.0~~$169.7 million and net accounts receivable of ~~$92.4~~$65.6 million. We maintain a $25.0 million revolving credit facility, under which we have drawn $6.5 million and utilized $1.5 million of ~~availability,~~available credit, which we used as collateral for two stand-by letters of credit, leaving ~~availability of~~ $17.0 million of available credit as of ~~March 31,~~June 30, 2021.

Our primary source of cash from operating activities has been from cash collections from our customers. We expect cash flows from operating activities to be affected by increases and decreases in sales volumes and timing of collections, and by purchases and shipments of inventory. Our primary uses of cash from operating activities have been for personnel costs and investment in our selling, general and administrative departments and research and development. Future cash outflows from operating activities may increase as a result of further investment in research and development and selling, general and administrative requirements, and increases in personnel costs as we continue to enhance our products and introduce new products in an effort to continue to expand our business.

During the ~~three~~six months ended ~~March 31,~~June 30, 2021, cash ~~used in~~provided by operating activities was ~~$5.2~~$26.7 million, primarily resulting from our net income of ~~$5.7~~$2.6 million, ~~plus~~ net non-cash adjustments of ~~$8.0~~$16.0 million ~~offset by~~and net cash ~~used in~~provided by changes in our operating assets and liabilities of ~~$18.9~~$8.1 million. The net cash ~~used in~~provided by changes in our operating assets and liabilities during the ~~three~~six months ended ~~March 31,~~June 30, 2021 was primarily due to a $28.4 million decrease in accounts ~~payable of $15.6 million~~receivable due to ~~timing of vendor payments;~~collections during the period; a decrease in accrued expenses of $10.1 million due to the timing of certain accrual payments, a $5.8 million increase in prepaid expenses and other assets; and a $0.7 million increase in prepaid income taxes. These uses of cash were partially offset by a $6.1$6.5 million increase in deferred revenue due to the timing of revenue recognition; and a ~~$4.6~~$5.4 million decrease in inventory due to the high volume of shipments during the ~~period;~~period. These sources of cash were partially offset by a ~~$2.2 million increase in accrued income taxes; and a $0.5~~$14.5 million decrease in accounts ~~receivable~~payable due to ~~collections during~~timing of vendor payments; a $10.2 million decrease in accrued expenses due to the ~~period.~~timing of certain accrued expenses; a $3.8 million increase in prepaid expenses and other assets; and a $3.2 million decrease in accrued income taxes.

Our investing activities have consisted primarily of expenditures for lab and computer equipment and software to support the development of new products. In addition, our investing activities include expansion of and improvements to our facilities. As our business expands, we expect that we will continue to invest in these areas.

Net cash used in investing activities during the ~~three~~six months ended ~~March 31,~~June 30, 2021 was ~~$2.3~~$2.9 million, consisting of purchases of property and equipment and software licenses.

Net cash used in financing activities during the ~~three~~six months ended ~~March 31,~~June 30, 2021 was ~~$4.8~~$12.8 million, consisting primarily of debt principal repayments of $8.3 million and employee taxes paid related to net share settlement of equity awards of ~~$4.6~~$5.7 million, ~~and debt principal repayments~~primarily due to the vestings of ~~$0.8 million.~~PSUs during the six months ended June 30, 2021. These payments were partially offset by proceeds from the exercise of stock options of ~~$0.6~~$1.2 million.

In July 2015, we entered into an $8.0 million commercial mortgage loan agreement, which matured on July 1, 2020. On July 1, 2020, we paid in full the remaining $6.5 million in unpaid principal and accrued interest under the mortgage loan with funds drawn upon our revolving credit facility. The annual interest rate on the loan was 3.5%, and the loan was repayable in 60 monthly installments of principal and interest based on a 20-year amortization schedule.

On December 20, 2016, we entered into a credit agreement with JPMorgan Chase Bank, N.A., as administrative agent, various lenders and JPMorgan Chase Bank, N.A. and Barclays Bank PLC, as joint lead arrangers and joint bookrunners, providing for:

As of ~~March 31,~~June 30, 2021 and December 31, 2020, we had borrowings of ~~$287.3~~$279.7 million and $288.0 million, respectively, outstanding under the term loan facility. As of ~~March 31,~~June 30, 2021 and December 31, 2020 we had borrowings of $6.5 million under the revolving credit facility, which were drawn down to fund the repayment of our commercial mortgage loan. As of ~~March 31,~~June 30, 2021 and December 31, 2020, we had also used $1.5 million of available credit under the revolving credit facility for two stand-by

letters of credit, one which serves as collateral to one of our customers pursuant to a contractual obligation and one which is used as collateral for operating leases in Australia. In addition, we may, subject to certain conditions, including the consent of the administrative agent and the institutions providing such increases, increase the facilities by an unlimited amount so long as we are in compliance with specified leverage ratios, or otherwise by up to $70.0 million.

Borrowings under the facilities bear interest at a floating rate, which can be either a Eurodollar rate plus an applicable margin or, at our option, a base rate (defined as the highest of (x) the JPMorgan Chase, 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 term loan facility 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 applicable margin for borrowings under the revolving credit facility is 1.75% per annum for Eurodollar rate loans and 0.75% per annum for base rate loans, subject to reduction based on our maintaining specified net leverage ratios. The interest rates payable under the facilities are subject to an increase of 2.00% per annum during the continuance of any payment default.

For Eurodollar rate loans, we may select interest periods of one, three or six months or, with the consent of all relevant affected lenders, twelve months. Interest will be 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. We have the right to convert Eurodollar rate loans into base rate loans and the right to convert base rate loans into Eurodollar rate loans at our option, subject, in the case of Eurodollar rate loans, to breakage costs if the conversion is effected prior to the end of the applicable interest period. As of ~~March~~June 30, 2021 and December 31, ~~2021,~~2020, the interest rate on the term loans was 5.00% per annum, which was based on a three-month and six-month Eurodollar rate, respectively, at the applicable floor of 1.00% per annum plus the applicable margin of 4.00% per annum for Eurodollar rate loans. As of December 31, 2020, the interest rate on our borrowings under the term loan facility was 5.00% per annum, which was based on a one-month Eurodollar rate of 1.00% per annum plus the applicable margin of 4.00% per annum for Eurodollar rate loans. As of March 31,June 30, 2021, the interest rate on the revolving credit facility was 2.01% per annum, which was based on a ~~one-month~~six-month Eurodollar rate of 0.26% per annum plus the applicable margin of 1.75% per annum for Eurodollar rate loans. As of December 31, 2020, the interest rate on the revolving credit facility was 2.12% per annum, which was based on the ~~one-month~~six-month Eurodollar rate of 0.37% per annum plus the applicable margin of 1.75% per annum for Eurodollar rate loans.

The term loan facility matures on December 20, 2023 and the revolving credit facility matures on December 20, 2021. The term loan facility is subject to amortization in equal quarterly installments, which commenced on March 31, 2017, of principal in an annual aggregate amount equal to 1.0% of the original principal amount of the term loans of $300.0 million, with the remaining outstanding balance payable at the date of maturity.

Voluntary prepayments of principal amounts outstanding under the term loan facility 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, we are required to compensate the lenders for any funding losses and expenses incurred as a result of the prepayment. Prior to the revolving credit facility maturity date, funds borrowed under the revolving credit facility may be borrowed, repaid and reborrowed, without premium or penalty.

In addition, we are required to make mandatory prepayments under the facilities with respect to (i) 100% of the net cash proceeds from certain asset dispositions (including casualty and condemnation events) by us or certain of our subsidiaries, subject to certain exceptions and reinvestment provisions, (ii) 100% of the net cash proceeds from the issuance or incurrence of any additional debt by us or certain of our subsidiaries, subject to certain exceptions, and (iii) 50% of our excess cash flow, as defined in the credit agreement, subject to reduction upon our achievement of specified performance targets. In accordance with these provisions, a mandatory prepayment of $6.8 million was paid on April 2, 2021.

The facilities are secured by, among other things, a first priority security interest, subject to permitted liens, in substantially all of our assets and all of the assets of certain of our subsidiaries and a pledge of certain of the stock of certain of our subsidiaries, in each case subject to specified exceptions. The facilities contain customary affirmative and negative covenants, including certain restrictions on our ability to pay dividends, and, with respect only to the revolving credit facility, a financial covenant requiring us to maintain a specified total net leverage ratio, in the event that on the last day of any fiscal quarter, we have utilized more than 30% of our borrowing capacity under the revolving credit facility (subject to certain exceptions). The term loan facility contains a cross-default provision, whereby, if repayment of borrowings under the revolving credit facility are accelerated due to a default of the net leverage ratio covenant, repayment of the outstanding term loan balance could also be accelerated. Because the financial covenant under the revolving credit facility only applies if outstanding utilization thereunder exceeds 30% of the total borrowing capacity on the last day of each fiscal quarter, this cross-default provision has the effect of limiting our ability to utilize more than 30% of our total borrowing capacity under the revolving credit facility of $25.0 million if both our net leverage ratio exceeds the maximum permitted by the agreement and we would not otherwise be able to reduce our outstanding utilization of the revolving credit facility to below the 30%

testing threshold prior to the last day of any quarter. As of ~~March 31,~~June 30, 2021 and December 31, 2020, we were ~~incompliance~~in compliance with all applicable covenants of the facilities. We do not expect to require the use of the revolving credit facility to fund operations during the next 12 months.

Of our total cash and cash equivalents of ~~$145.0~~$168.7 million as of ~~March 31,~~June 30, 2021, ~~$113.2~~$145.0 million was held by our foreign subsidiaries. The Tax Cuts and Jobs Act, or TCJA, established a modified territorial system requiring a mandatory deemed repatriation tax on undistributed earnings of foreign subsidiaries. As of ~~March 31,~~June 30, 2021, we had ~~$30.4~~$26.4 million of undistributed earnings in China that are not indefinitely reinvested. The remaining unremitted earnings of our foreign subsidiaries are either indefinitely reinvested or could be remitted with an immaterial tax cost.

We believe our existing cash and cash equivalents, anticipated cash flows from future operations and liquidity available from our revolving credit facility will be sufficient to meet our working capital and capital expenditure needs and debt service obligations for at least the next 12 months. Our future capital requirements may vary materially from those currently planned and will depend on many factors, including our rate of revenue growth, the timing and extent of spending on research and development efforts and other business initiatives, purchases of capital equipment to support our growth, the expansion of sales and marketing activities, expansion of our business through acquisitions or our investments in complementary products, technologies or businesses, the use of working capital to purchase additional inventory, the timing of new product introductions, market acceptance of our products and overall economic conditions. To the extent that current and anticipated future sources of liquidity are insufficient to fund our future business activities and requirements, we may be required to seek additional equity or debt financing. In the event additional financing is required from outside sources, we may not be able to raise it on terms acceptable to us or at all.

On February 21, 2019, we announced a stock repurchase program under which we were authorized to repurchase up to $75.0 million of our common stock. During the ~~three~~six months ended ~~March 31,~~June 30, 2020, we repurchased approximately 1.2 million shares for a total cost of approximately $3.0 million. During the ~~three~~six months ended ~~March 31,~~June 30, 2021 we did not repurchase any shares. As of ~~March 31,~~June 30, 2021, approximately $70.2 million remained authorized for repurchases of our common stock under the stock repurchase program. The stock repurchase program has no expiration date and does not require us to purchase a minimum number of shares, and we may suspend, modify or discontinue the stock repurchase program at any time without prior notice.

Our material contractual obligations include our term loan facility, revolving credit facility, operating leases and purchase agreements with our contract manufacturers and suppliers. There have been no material changes to our contractual obligations and commitments from those disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2020.

We prepare our condensed consolidated financial statements in accordance with generally accepted accounting principles in the United States. The preparation of condensed consolidated financial statements also requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, costs and expenses and related disclosures. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances. Actual results could differ significantly from the estimates made by our management.

Other than our policies related to Stock-based Compensation and our adoption of ASU 2020-06, as described in Note 2 of the above notes to the condensed consolidated financial statements, there have been no material changes to our critical accounting policies and estimates from those disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2020.

As of ~~March 31,~~June 30, 2021 and December 31, 2020, we did not have any off-balance sheet arrangements, as defined in Item 303(a)(4)(ii) of Regulation S-K, such as the use of unconsolidated subsidiaries, structured finance, special purpose entities or variable interest entities.

Refer to the “Summary of Significant Accounting Policies” footnote within our condensed consolidated financial statements included elsewhere in this Quarterly Report on Form 10-Q for our analysis of recent accounting pronouncements that are applicable to our business.

Market risk is the risk of loss to future earnings, values or future cash flows that may result from changes in the price of a financial instrument. The value of a financial instrument may change as a result of changes in interest rates, exchange rates, commodity prices, equity prices and other market changes. We are exposed to market risk related to changes in foreign currency exchange rates and interest rates. We currently mitigate certain foreign currency exchange rate risks with derivative instruments and enter into exchange rate hedging arrangements to manage certain of the risks described below. We do not engage in foreign currency speculation.

We have accounts receivables denominated in foreign currencies, and our operations outside of the United States incur their operating expenses in foreign currencies. To date, the majority of our product sales and inventory purchases have been denominated in U.S. dollars. For our subsidiaries in Ireland and Australia, the U.S. dollar is the functional currency. For each of our other foreign subsidiaries, the functional currency is the local currency. During the ~~three~~six months ended ~~March 31,~~June 30, 2021 and 2020, we incurred foreign currency transaction (losses) gains ~~(losses)~~ of ~~$(0.7)~~$(1.0) million and ~~$0.2~~$0.7 million, respectively, primarily related to unrealized and realized foreign currency (losses) gains for accounts receivable denominated in foreign currencies and operating expenses that are denominated in local currencies. We recorded these foreign currency transaction ~~losses~~(losses) gains as a component of other income (expense), net in our condensed consolidated statements of ~~income~~operations and comprehensive (loss) income. We believe that a 10% change in the exchange rate between either the U.S. dollar and Euro or the U.S. dollar and Australian dollar would not materially impact our operating results or financial position.

Our foreign currency risk management practices are principally intended to mitigate the potential financial impact of changes in the value of transactions and balances denominated in foreign currencies resulting from changes in foreign currency exchange rates. From time to time we enter into cash flow hedges, which utilize foreign currency forward contracts to hedge specific forecasted transactions of our foreign subsidiaries with the goal of protecting our budgeted revenues and expenses against foreign currency exchange rate changes compared to our budgeted rates. During the three and six months ended ~~March 31,~~June 30, 2020, we settled one cash flow hedge which was used to hedge specific operating cash flows denominated in Australian dollars. No cash flow hedges were settled or outstanding during the three or six months ended June 30, 2021.

Additionally, from time to time, we enter into other foreign currency forward contracts with the goal of protecting outstanding receivables denominated in currencies other than the U.S. dollar. As of June 30, 2021 we had a currency forward contract outstanding with a notional amount totaling ~~0.3~~1.1 million Euros that will mature in the ~~second~~third quarter of 2021, and we expect to continue to hedge certain significant transactions denominated in currencies other than the U.S. dollar in the future.

The success of our foreign currency risk management program depends upon forecasts of transaction activity denominated in various currencies. To the extent that these forecasts are overstated or understated during periods of currency volatility, we could experience unanticipated foreign currency gains or losses that could have a material impact on our results of operations. Furthermore, our failure to identify new exposures and hedge against them in an effective manner may result in material foreign currency gains or losses.

Our cash and cash equivalents as of ~~March 31,~~June 30, 2021 and December 31, 2020 consisted of cash maintained in FDIC-insured operating accounts as well as investments in money market mutual funds and certificates of deposit. We also have policies requiring us to invest in high-quality issuers, limit our exposure to any individual issuer, and ensure adequate liquidity. Our primary exposure to market risk for our cash equivalents is interest income sensitivity, which is primarily affected by changes in the general level of U.S. interest rates. However, we do not believe a sudden change in the interest rates for our cash equivalents would have a material impact on our financial condition, results of operations or cash flows.

We have a credit agreement that provides us with a term loan facility of $300.0 million and a revolving credit facility of up to $25.0 million in revolving credit loans and letters of credit. Borrowings under the facilities bear interest at a floating rate, which can be either a Eurodollar rate plus an applicable margin or, at our option, a base rate (defined as the highest of (x) the JPMorgan Chase, 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 term loan facility 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 applicable margin for borrowings under the revolving credit facility is 1.75% per annum for Eurodollar rate loans and 0.75% per annum for base rate loans, subject to reduction based on our maintaining of specified net leverage ratios.

As of ~~March 31,~~June 30, 2021, we had borrowings of ~~$287.3~~$279.7 million outstanding under the term loan facility, bearing interest at a rate of 5.00% per annum, which was based on a ~~six-month~~three-month Eurodollar rate at the applicable floor of 1.00% per annum plus

the applicable margin of 4.00% per annum for Eurodollar rate loans. Changes in interest rates could cause interest charges on our term loan facility to fluctuate. Based on the amount of borrowings outstanding as of ~~March 31,~~June 30, 2021, an increase or decrease of 10% in the ~~one-month~~ Eurodollar rate as of March 31, 2021 would cause pre-tax decreases to our earnings and cash flows of approximately $0.3 million per year, assuming that such rate was to remain in effect for a year. A decrease in the one-month Eurodollar rate as of March 31, 2021 would have no impact on our earnings and cash flows, as the interest rate in effect at ~~March 31,~~June 30, 2021 on the term loan facility was at the applicable floor of 1.00% per ~~annum.~~annum and would continue to be in effect with a change of 10%.

On July 1, 2020, we drew down upon our revolving credit facility under our term loan agreement in the amount of $6.5 million. As noted in Note 10, Debt, borrowings under the revolving credit facility mature on December 21, 2021 and the applicable margin for borrowings under the revolving credit facility is 1.75% per annum for Eurodollar rate loans. The interest rate on the outstanding borrowings as of ~~March 31,~~June 30, 2021, was 2.01%, which was based on a six-month Eurodollar rate of 0.26% per annum plus the applicable margin of 1.75% per annum for Eurodollar rate loans. An increase or decrease of 10% in the one-month Eurodollar rate would result in a pre-tax change to our earnings and cash flows of less than $0.1 million per year, assuming that such rate was to remain in effect for a year.

We do not believe that inflation has had a material effect on our ~~business.~~business to date. However, ifas more fully described in Item 2 above, global demand for the base materials utilized by our suppliers ~~were to significantly increase for~~and supply chain risks could result in significant increases in the costs of the components we purchase, ~~from them, our costs could become subject to significant inflationary pressures,~~ and we may not be able to fully offset such higher costs through price increases. Our inability or failure to do so could harm our business, operating results and financial condition.

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a- 15(e) and 15d- 15(e) under the Securities Exchange Act of 1934, as amended, or the Exchange Act), as of the end of the period covered by this Quarterly Report on Form 10-Q. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Our management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and our management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on the evaluation of our disclosure controls and procedures as of the end of the period covered by this Quarterly Report on Form 10-Q, our Chief Executive Officer and Chief Financial Officer have concluded that as of such date, our disclosure controls and procedures were effective.

There were no changes in our internal control over financial reporting during our most recently completed fiscal quarter that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

From time to time, we are 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 us in the form of letters and other communications.

On May 29, 2019, John Shen filed a putative shareholder class action complaint in the Massachusetts Superior Court of Essex County, John Shen v. Casa Systems, Inc, et al., Civil Action No. 1977CV00787, against us; certain of our current and former executive officers and directors; Summit Partners, our largest investor; and the underwriters from our December 15, 2017, initial public offering, or IPO. On July 3, 2019, Mirza R. Baig filed a similar putative shareholder class action complaint in the Massachusetts Superior Court of Essex County, Mirza R. Baig v. Casa Systems, Inc., Civil Action No. 1977CV00961, against the same defendants. Pursuant to plaintiffs’ motion filed on July 26, 2019, and accepted September 3, 2019, the two matters were consolidated and transferred to the Business Litigation Session of the Massachusetts Superior Court, Suffolk County, John Shen v. Casa Systems, Inc, et al., Civil Action No. 19-CV-03203-BLS2 and Mirza R. Baig v. Casa Systems, Inc., Civil Action No. 19-CV-03204-BLS2. The complaints purported to be brought on behalf of all purchasers of our common stock in and/or traceable to the IPO. The complaints generally alleged that (i) each of the defendants violated Section 11 and/or Section 12(a)(2) of the Securities Act of 1933, as amended, or the Securities Act, because documents related to the IPO, including our registration statement and prospectus were materially misleading by containing untrue statements of material fact and/or omitting to state material facts necessary to make such statements not misleading and (ii) the individual defendants and Summit Partners acted as controlling persons within the meaning and in violation of Section 15 of the Securities Act. On November 12, 2019, plaintiffs filed an amended shareholder class action complaint, purportedly on behalf of all purchasers of our common stock in and/or traceable to the IPO, which contained substantially similar allegations and asserted the same claims as the two initial complaints, described above. Plaintiffs sought, among other things compensatory damages, costs and expenses, including counsel and expert fees, rescission or a rescissory measure of damages, and equitable and injunctive relief. On January 14, 2020, the defendants filed motions to dismiss the amended complaint with prejudice. On January 12, 2021, the court granted the motions to dismiss. On February 22, 2021, plaintiffs filed notice of appeal. The appeal has not yet been docketed by the appellate court, and no filing has been made.

On August 9, 2019, Donald Hook filed a putative shareholder class action lawsuit in the Supreme Court of the State of New York, County of New York, Donald Hook, et al., v. Casa Systems, Inc. et al., Index No. 654548/2019, against the same defendants named in the Shen and Baig matters. The complaint purports to be brought on behalf of all purchasers of our common stock in and/or traceable to our IPO and generally alleges that (i) each of the defendants violated Section 11 and/or Section 12(a)(2) of the Securities Act because documents related to our IPO including our registration statement and prospectus were materially misleading by containing untrue statements of material fact and/or omitting to state material facts necessary to make such statements not misleading and (ii) the individual defendants and Summit Partners acted as controlling persons within the meaning and in violation of Section 15 of the Securities Act. On November 22, 2019, plaintiff filed an amended complaint, which contains substantially similar allegations as the initial complaint, described above, and asserts claims for violations of Sections 11 and 15 of the Securities Act. Plaintiff seeks, among other things, compensatory damages, costs and expenses, including counsel and expert fees, rescission or a rescissory measure of damages, disgorgement, and equitable and injunctive relief. On January 21, 2020, the defendants filed motions to dismiss the amended complaint, which ~~remains~~remain pending.

On August 13, 2019, Panther Partners, Inc. filed a putative shareholder class action lawsuit in the Supreme Court of the State of New York, New York County, Panther Partners, Inc., et al., v. Jerry Guo et al., Index No 654585/2019, against us, certain of our current and former executive officers and directors, and the underwriters from our April 30, 2018 follow-on offering of common stock, which we refer to as our “Follow-on Offering.” The complaint purports to be brought on behalf of all purchasers of our common stock in our Follow-on Offering and generally alleges that (i) each of the defendants, other than Abraham Pucheril, violated Section 11 of the Securities Act, and each of the defendants violated Section 12(a)(2) of the Securities Act, because documents related to our Follow-on Offering, including our registration statement and prospectus, were materially misleading by containing untrue statements of material fact and/or omitting to state material facts necessary to make such statements not misleading and (ii) the individual defendants acted as controlling persons within the meaning and in violation of Section 15 of the Securities Act. On November 22, 2019, plaintiff filed an amended complaint, which contains substantially similar allegations and asserts the same claims as the initial complaint, described above. Plaintiff seeks, among other things, compensatory damages, costs and expenses, including counsel and expert fees, rescission or a rescissory measure of damages, and equitable and injunctive relief. On January 21, 2020, the defendants served motions to dismiss the amended complaint, which remain pending.

No amounts have been accrued for any of the putative class action lawsuits referenced above as of ~~March 31,~~June 30, 2021, as we do not believe the likelihood of a material loss is probable. Although the ultimate outcome of these matters cannot be predicted with certainty, the resolution of any of these matters could have a material impact on our results of operations in the period in which such matter is resolved.

In addition to the other information set forth in this Quarterly Report on Form 10-Q, you should carefully consider the factors discussed in “Part I, Item 1A Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2020, or the 2020 10-K, which could materially affect our business, financial condition or future results. ~~There~~Other than the updated risk factors described below, there have been no material changes from the risk factors previously disclosed in the 2020 10-K.

The coronavirus outbreak could negatively impact our operations and have an adverse effect on our revenues and/or results of operations.

The COVID-19 pandemic and the accompanying responses of governments and businesses to the pandemic continue to present various risks to us, not all of which we are able to fully evaluate or even to foresee at the current time and could have a material effect upon the estimates and judgments relied upon by management. While the COVID-19 pandemic did not significantly adversely affect our financial results, business operations or liquidity during the three and six months ended June 30, 2021, economic and health conditions in the United States and across most of the globe changed rapidly during the period and are continuing to change after the end of the quarter. Globally, all aspects of our business remain fully operational. The pandemic has led to increased demand for certain of our products, resulting in increased order volumes that have created additional pressure on our supply chain. In addition, certain of our products utilize components, for which there has been increased global demand. As a result, we have begun to see shortages of supply that have increased the likelihood of an adverse impact on our future revenue and gross margins and ability to fill orders for customers in a timely manner. We continue to work with our supply chain and contract manufacturers, as well as our customers, to minimize the possible extent of such impacts. However, at this time we are neither able to estimate the extent of these impacts nor predict whether our efforts to minimize or contain them will be successful. We intend to continue to monitor our business very closely for any effects of COVID-19 for as long as necessary.

Due to the above circumstances and as described generally in our 2020 Annual Report on Form 10-K, our results of operations for the three and six months ended June 30, 2021, and the year ended December 31, 2020, are not necessarily indicative of the results to be expected in future periods. Management cannot predict the full impact of the COVID-19 pandemic on our sales channels, supply chain, manufacturing and distribution, or on economic conditions generally, including the effects on our current and potential customers, who may curtail spending on investments in current and/or new technologies, delay new equipment evaluations and trials, and possibly delay payments based on liquidity concerns, all of which could have a material impact on our business in the future. Similarly, our supply chain and our contract manufacturers could be affected, which could cause disruptions to our ability to meet customer demand or delivery schedules. For the three and six months ended June 30, 2021, we did see certain delays in the supply chain that adversely impacted a small number of delivery schedules. If COVID-19 were to continue to cause such impacts in the future, there could likely be a material

adverse impact on our financial results, liquidity and capital resource needs. This uncertainty makes it challenging for management to estimate the future performance of our businesses, particularly over the near to medium term. However, the impact of COVID-19 could have a material adverse impact on our results of operations over the near to medium term.

The coronavirus outbreak has resulted in an increase in demand for certain of our solutions, which may subside or decrease when the pandemic ends.

The pandemic, and resulting lockdowns, has resulted in an increase in demand for residential broadband services, which has in turn lead to an increase in demand for certain of our solutions, including our fiber extension home network connection devices and our Fixed Wireless Access CPE devices. We also saw a shift in demand from our cable customers toward more I-CCAP chassis each quarter. That increase in demand contributed to our strong revenue performance in 2020. We cannot guarantee that the heightened demand for residential broadband services will continue for the duration of the pandemic or after the pandemic ends. We similarly cannot guarantee that even to the extent the heightened demand for residential broadband services continues that we will continue to see heightened demand for our solutions. A decrease in demand for our solutions could have a material adverse impact on our revenue and results of operations.

On December 14, 2017, the Securities and Exchange Commission, or the SEC, declared our registration statement on Form S-1 (File No. 333-221658) for our initial public offering, or IPO, effective. The net offering proceeds to us from the IPO, after deducting underwriting discounts of $6.3 million and offering expenses payable by us totaling $4.1 million, were approximately $79.3 million. No offering discounts, commissions or expenses were paid directly or indirectly to any of our directors or officers (or their associates) or persons owning 10.0% or more of any class of our equity securities or to any other affiliates. There has been no material change in the planned use of proceeds from our IPO as described in our final prospectus filed with the SEC on December 15, 2017 pursuant to Rule 424(b)(4). As of ~~March 31,~~June 30, 2021, we had not used any of the net offering proceeds and we have invested the proceeds into an investment portfolio with the primary objective of preserving principal and providing liquidity without significantly increasing risk.

The following table sets forth information with respect to repurchases of shares of our common stock during the three-month period ended ~~March 31,~~June 30, 2021:

Period

Total Number of
Shares Purchased

Average
Price Paid per
Share (1)

Total Number of
Shares Purchased
as Part of Publicly
Announced Plans or
Programs (2)

Approximate Dollar
Value of Shares
that May Yet Be
Purchased Under
the Plans or
Programs

(In thousands)

(In thousands)

(In thousands)

January 1 - January 31, 2021

—

$
—

—

$
70,208

February 1 - February 28, 2021

—

$
—

—

$
70,208

March 1 - March 31, 2021

—

$
—

—

$
70,208

Period	Total Number of Shares Purchased		Average Price Paid per Share (1)		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (2)		Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs
	(In thousands)				(In thousands)		(In thousands)
April 1 - April 30, 2021		—	$	—		—	$	70,208
May 1 - May 31, 2021		—	$	—		—	$	70,208
June 1 - June 30, 2021		—	$	—		—	$	70,208

On April 28, 2021, we entered into an employment agreement with Scott Bruckner, our Chief Financial Officer. Under the employment agreement, Mr. Bruckner is an at-will employee, and his employment with us can be terminated by him or us at any time and for any reason. The employment agreement provides that Mr. Bruckner is entitled to an annual base salary of $463,600.00 during his employment with us and that he is eligible, at our sole discretion, to earn a target annual bonus equal to 100% of his base salary, subject to adjustment. The employment agreement also provides that Mr. Bruckner is eligible to participate in our annual long-term incentive program, with a target annual equity award equal to 250% of his then-current base salary, and with the form, terms and conditions of such long-term incentive awards to be determined in our sole discretion.None.

Under the employment agreement, Mr. Bruckner is entitled, subject to his execution and nonrevocation of a release of claims in our favor, in the event of the termination of his employment by us without cause or by him for good reason in connection with a change in control (as such terms are defined in the employment agreement) to (i) receive an amount equal to the sum of his then-current annual base salary, with such amount payable in equal installments over a period of 12 months, (ii) continue to receive an amount equal to COBRA premiums for health benefit coverage on the same terms as were applicable to him prior to his termination for a period of 12 months following the date that his employment with us is terminated, or earlier, if he becomes eligible to enroll in a health benefit plan with a new employer, and (iii) accelerated vesting of all outstanding and unvested time-based stock options and other equity awards, with any stock options being exercisable following his termination of employment for the period of time set forth in the applicable option agreement.

In addition, the employment agreement provides that in the event Mr. Bruckner’s employment with us terminates by reason of his death or disability, Mr. Bruckner is entitled to accelerated vesting of all outstanding and unvested time-based stock options and other equity awards, with any stock options being exercisable following his termination of employment for the period of time set forth in the applicable option agreement.

~~The foregoing summary is qualified in its entirety by the terms of the employment agreement, a copy of which is being filed herewith.~~

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Delaware		75-3108867
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)
100 Old River Road Andover, Massachusetts		01810
(Address of principal executive offices)		(Zip Code)

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, $0.001 par value per share	CASA	The Nasdaq Stock Market LLC

		Page
PART I.	FINANCIAL INFORMATION	3
Item 1.	Financial Statements	3
	Condensed Consolidated Financial Statements (Unaudited)	3
	Condensed Consolidated Balance Sheets as of ~~March 31,~~June 30, 2021 and December 31, 2020	3
	Condensed Consolidated Statements of ~~Income~~Operations and Comprehensive (Loss) Income for the Three and Six months ended ~~March 31,~~June 30, 2021 and 2020	4
	Condensed Consolidated Statements of Stockholders' Equity for the Three and Six months ended ~~March 31,~~June 30, 2021 and 2020	5
	Condensed Consolidated Statements of Cash Flows for the ~~Three~~Six months ended ~~March 31,~~June 30, 2021 and 2020	67
	Notes to Unaudited Condensed Consolidated Financial Statements	78
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	2526
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	3337
Item 4.	Controls and Procedures	3438
PART II.	OTHER INFORMATION	3539
Item 1.	Legal Proceedings	3539
Item 1A.	Risk Factors	3640
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	3641
Item 5.	Other Information	3741
Item 6.	Exhibits	3842
Signatures		3943

	Three Months Ended March 31,
	2021		2020
Options to purchase common stock		2,382		5,941
Unvested restricted stock units		1,221		2,527
Unvested performance-based stock units		—		983

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Options to purchase common stock		6,639		7,562		2,358		7,562
Unvested restricted stock units		3,642		4,112		831		4,112
Unvested performance-based stock units		442		983		—		983

Large accelerated filer	☐	Accelerated filer	☒
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☒

	Accounts Receivable, Net
	June 30, 2021			December 31, 2020
Customer A		24	%	*
Customer C		10	%	*
Customer F	*				17	%

	Fair Value Measurements as of December 31, 2020 Using:
	Level 1		Level 2		Level 3		Total
Assets:
Certificates of deposit—restricted cash	$	—	$	1,006	$	—	$	1,006
Money market mutual funds		114,404		—		—		114,404
	$	114,404	$	1,006	$	—	$	115,410
Liabilities:
SARs	$	—	$	—	$	493	$	493
	$	—	$	—	$	493	$	493

Exhibit Number		Description

3.1		Restated Certificate of Incorporation of the Registrant (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K (File No. 001-38324) filed on December 19, 2017)

3.2		By-laws of the Registrant (incorporated by reference to Exhibit 3.2 to the Registrant’s Current Report on Form 8-K (File No. 001-38324) filed on December 19, 2017)

~~10.1~~		~~Employment Agreement, dated April 28, 2021, by and between the Registrant and Scott Bruckner~~

~~31.1~~31.1*		Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

~~31.2~~31.2*		Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

32.1*		Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

32.2*		Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

101.INS		Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document

101.SCH		Inline XBRL Taxonomy Extension Schema Document

101.CAL		Inline XBRL Taxonomy Extension Calculation Linkbase Document

101.DEF		Inline XBRL Taxonomy Extension Definition Linkbase Document

101.LAB		Inline XBRL Taxonomy Extension Label Linkbase Document

101.PRE		Inline XBRL Taxonomy Extension Presentation Linkbase Document

104		Cover Page Interactive Data File (formatted as inline XBRL with applicable taxonomy extension information contained in Exhibits 101)

	CASA SYSTEMS, INC.

Date: ~~April~~July 30, 2021	By:	/s/ Jerry Guo
		Jerry Guo
		President, Chief Executive Officer and Chairman (Principal Executive Officer)

Date: ~~April~~July 30, 2021	By:	/s/ Scott Bruckner
		Scott Bruckner
		Chief Financial Officer (Principal Financial Officer)