Calix (CALX) 10-Q 25 Oct 22 2022 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Oct. 01, 2022	Oct. 17, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Oct. 01, 2022
Document Transition Report	false
Entity File Number	001-34674
Entity Registrant Name	Calix, Inc
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	68-0438710
Entity Address, Address Line One	2777 Orchard Parkway
Entity Address, City or Town	San Jose
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95134
City Area Code	408
Local Phone Number	514-3000
Title of 12(b) Security	Common Stock, par value $0.025 per share
Trading Symbol	CALX
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		65,441,288
Entity Central Index Key	0001406666
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Oct. 01, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 75,172	$ 51,333
Marketable securities	159,534	153,002
Accounts receivable, net	100,527	85,219
Inventory	141,116	88,880
Prepaid expenses and other current assets	58,827	30,811
Total current assets	535,176	409,245
Property and equipment, net	24,348	21,783
Right-of-use operating leases	10,002	12,182
Deferred tax assets	163,737	168,962
Goodwill	116,175	116,175
Other assets	17,441	13,685
Total assets	866,879	742,032
Current liabilities:
Accounts payable	66,246	29,061
Accrued liabilities	80,573	71,597
Deferred revenue	33,687	27,478
Total current liabilities	180,506	128,136
Long-term portion of deferred revenue	24,919	22,016
Operating leases	9,443	12,376
Other long-term liabilities	4,264	11,076
Total liabilities	219,132	173,604
Commitments and contingencies (See Note 6)
Stockholders’ equity:
Preferred stock, $0.025 par value; 5,000 shares authorized; no shares issued and outstanding as of October 1, 2022 and December 31, 2021	0	0
Common stock, $0.025 par value; 100,000 shares authorized; 65,442 shares issued and outstanding as of October 1, 2022, and 64,274 shares issued and outstanding as of December 31, 2021	1,636	1,607
Additional paid-in capital	1,050,826	997,855
Accumulated other comprehensive loss	(3,084)	(320)
Accumulated deficit	(401,631)	(430,714)
Total stockholders’ equity	647,747	568,428
Total liabilities and stockholders’ equity	$ 866,879	$ 742,032

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Oct. 01, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.025	$ 0.025
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.025	$ 0.025
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	65,442,000	64,274,000
Common stock, shares outstanding (in shares)	65,442,000	64,274,000

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Revenue:
Revenue	$ 236,334	$ 172,231	$ 623,324	$ 502,975
Cost of revenue:
Cost of revenue	117,762	82,738	312,780	237,621
Gross profit	118,572	89,493	310,544	265,354
Operating expenses:
Sales and marketing	46,134	31,144	123,363	88,905
Research and development	33,196	25,727	93,443	75,807
General and administrative	19,237	14,631	54,179	41,320
Total operating expenses	98,567	71,502	270,985	206,032
Operating income	20,005	17,991	39,559	59,322
Interest and other income (expense), net:
Interest income (expense), net	595	(86)	870	(330)
Other income (expense), net	(134)	(463)	(474)	(120)
Total interest and other income (expense), net	461	(549)	396	(450)
Income before income taxes	20,466	17,442	39,955	58,872
Income taxes	7,023	(159,982)	10,872	(159,625)
Net income	$ 13,443	$ 177,424	$ 29,083	$ 218,497
Net income per common share:
Basic (in dollars per share)	$ 0.21	$ 2.79	$ 0.45	$ 3.47
Diluted (in dollars per share)	$ 0.19	$ 2.61	$ 0.42	$ 3.24
Weighted-average number of shares used to compute net income per common share
Basic (in shares)	65,355	63,588	64,892	63,057
Diluted (in shares)	69,174	67,907	68,587	67,537
Other comprehensive loss, net of tax:
Unrealized loss on available-for-sale marketable securities, net	$ (488)	$ 0	$ (1,956)	$ 0
Foreign currency translation adjustments, net	(335)	(24)	(808)	(15)
Total other comprehensive loss, net of tax	(823)	(24)	(2,764)	(15)
Comprehensive income	12,620	177,400	26,319	218,482
Systems
Revenue:
Revenue	225,845	163,076	591,466	475,931
Cost of revenue:
Cost of revenue	110,573	76,339	290,934	218,675
Services
Revenue:
Revenue	10,489	9,155	31,858	27,044
Cost of revenue:
Cost of revenue	$ 7,189	$ 6,399	$ 21,846	$ 18,946

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning Balance (in shares) at Dec. 31, 2020		62,122
Balance at beginning of period at Dec. 31, 2020	$ 280,325	$ 1,553	$ 948,055	$ (191)	$ (669,092)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	18,055		18,055
Issuance of common stock under equity incentive plans, net of forfeitures (in shares)		1,610
Issuance of common stock under equity incentive plans, net of forfeitures	18,764	$ 41	18,723
Net income	218,497				218,497
Other comprehensive loss	(15)			(15)
Ending Balance (in shares) at Oct. 02, 2021		63,732
Balance at end of period at Oct. 02, 2021	535,626	$ 1,594	984,833	(206)	(450,595)
Beginning Balance (in shares) at Jul. 03, 2021		63,200
Balance at beginning of period at Jul. 03, 2021	345,638	$ 1,580	972,259	(182)	(628,019)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	6,661		6,661
Issuance of common stock under equity incentive plans, net of forfeitures (in shares)		532
Issuance of common stock under equity incentive plans, net of forfeitures	5,927	$ 14	5,913
Net income	177,424				177,424
Other comprehensive loss	(24)			(24)
Ending Balance (in shares) at Oct. 02, 2021		63,732
Balance at end of period at Oct. 02, 2021	$ 535,626	$ 1,594	984,833	(206)	(450,595)
Beginning Balance (in shares) at Dec. 31, 2021	64,274	64,274
Balance at beginning of period at Dec. 31, 2021	$ 568,428	$ 1,607	997,855	(320)	(430,714)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	31,502		31,502
Issuance of common stock under equity incentive plans, net of forfeitures (in shares)		1,168
Issuance of common stock under equity incentive plans, net of forfeitures	21,498	$ 29	21,469
Net income	29,083				29,083
Other comprehensive loss	$ (2,764)			(2,764)
Ending Balance (in shares) at Oct. 01, 2022	65,442	65,442
Balance at end of period at Oct. 01, 2022	$ 647,747	$ 1,636	1,050,826	(3,084)	(401,631)
Beginning Balance (in shares) at Jul. 02, 2022		65,241
Balance at beginning of period at Jul. 02, 2022	617,129	$ 1,631	1,032,833	(2,261)	(415,074)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	11,027		11,027
Issuance of common stock under equity incentive plans, net of forfeitures (in shares)		201
Issuance of common stock under equity incentive plans, net of forfeitures	6,971	$ 5	6,966
Net income	13,443				13,443
Other comprehensive loss	$ (823)			(823)
Ending Balance (in shares) at Oct. 01, 2022	65,442	65,442
Balance at end of period at Oct. 01, 2022	$ 647,747	$ 1,636	$ 1,050,826	$ (3,084)	$ (401,631)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021
Operating activities:
Net income	$ 29,083	$ 218,497
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	31,502	18,055
Depreciation and amortization	10,837	11,351
Deferred income taxes	5,225	(161,995)
Net accretion of available-for-sale securities	(533)	0
Changes in operating assets and liabilities:
Accounts receivable, net	(15,308)	(22,510)
Inventory	(52,236)	(22,897)
Prepaid expenses and other assets	(32,854)	(9,776)
Accounts payable	36,170	18,311
Accrued liabilities	9,825	(7,008)
Deferred revenue	9,112	6,691
Other long-term liabilities	(9,745)	(4,544)
Net cash provided by operating activities	21,078	44,175
Investing activities
Purchases of property and equipment	(9,260)	(7,271)
Purchases of marketable securities	(142,280)	(200,509)
Maturities of marketable securities	134,325	125,000
Net cash used in investing activities	(17,215)	(82,780)
Financing activities:
Proceeds from common stock issuances related to employee benefit plans	21,498	18,764
Payments related to financing arrangements	(995)	(723)
Net cash provided by financing activities	20,503	18,041
Effect of exchange rate changes on cash and cash equivalents	(527)	(28)
Net increase (decrease) in cash and cash equivalents	23,839	(20,592)
Cash and cash equivalents at beginning of period	51,333	80,807
Cash and cash equivalents at end of period	$ 75,172	$ 60,215

Company and Basis of Presentati

Company and Basis of Presentation	9 Months Ended
	Oct. 01, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Company and Basis of Presentation	Company and Basis of Presentation Company Calix, Inc. (together with its subsidiaries, “Calix” or the “Company”) was incorporated in August 1999 and is a Delaware corporation. The Company is the leading global provider of cloud and software platforms, systems and services that focus on the subscriber-facing network, the portion of the network that governs available bandwidth and determines the range and quality of services that can be offered to subscribers. These cloud and software platforms enable broadband service providers (“BSPs”) of all types and sizes to innovate and transform their businesses. The Company’s BSP customers are empowered to utilize real-time data and insights from Calix platforms to simplify their businesses and deliver experiences that excite their subscribers. These insights enable BSPs to grow their businesses through increased subscriber acquisition, loyalty and revenue, thereby increasing the value of their businesses and contributions to their communities. Basis of Presentation The accompanying unaudited condensed consolidated financial statements, including the accounts of Calix, Inc. and its wholly-owned subsidiaries, have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission (“SEC”) for interim reporting. As permitted under those rules, certain footnotes or other financial information that are normally required by U.S. generally accepted accounting principles (“GAAP”) can be condensed or omitted. In the opinion of management, the financial statements include all normal and recurring adjustments that are considered necessary for the fair presentation of the Company’s financial position and operating results. All intercompany balances and transactions have been eliminated in consolidation. The Condensed Consolidated Balance Sheet as of December 31, 2021 has been derived from the audited financial statements at that date. The results of the Company’s operations can vary during each quarter of the year. Therefore, the results and trends in these interim financial statements may not be the same as those for the full year or any future periods. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the audited financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. The Company’s fiscal year begins on January 1 st and ends on December 31 st . Quarterly periods are based on a 4-4-5 calendar with the first quarter ending on the Saturday closest to March 31 st . As a result, the Company had one less day in the nine months ended October 1, 2022 than for the nine months ended October 2, 2021. The preparation of financial statements in conformity with GAAP for interim financial reporting requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Actual results could differ from those estimates. Risks and Uncertainties The Company is subject to risks and uncertainties as a result of the COVID-19 pandemic. The extent of the impact of the COVID-19 pandemic on the Company’s business is highly uncertain and difficult to predict, particularly as variants of the coronavirus continue to spread around the world. The COVID-19 pandemic has had a prolonged impact on the Company’s supply chain operations due to restrictions, reduced capacity and limited availability from suppliers on whom the Company relies for sourcing components and materials and from third-party partners on whom the Company relies for manufacturing, warehousing and logistics services. Shortages and delays relating to the Company’s components and materials have also caused, and may continue to cause, difficulties in managing global logistics, and transport and warehousing services for the Company’s products. The prolonged impact of COVID-19 could exacerbate these constraints or cause further supply chain disruptions.

Significant Accounting Policies

Significant Accounting Policies	9 Months Ended
	Oct. 01, 2022
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting PoliciesThe Company’s significant accounting policies are disclosed in its Annual Report on Form 10-K for the year ended December 31, 2021. The Company’s significant accounting policies did not change during the nine months ended October 1, 2022. Newly Adopted Accounting Standard The Company did not adopt any new accounting standards during the nine months ended October 1, 2022 that were significant to the Company. Recent Accounting Pronouncements Not Yet Adopted There have been no additional accounting pronouncements or changes in accounting pronouncements during the nine months ended October 1, 2022 as compared to the recent accounting pronouncements described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021, that are significant or potentially significant to the Company.

Cash, Cash Equivalents, and Mar

Cash, Cash Equivalents, and Marketable Securities	9 Months Ended
	Oct. 01, 2022
Cash and Cash Equivalents [Abstract]
Cash, Cash Equivalents and Marketable Securities	Cash, Cash Equivalents and Marketable Securities The Company has invested its excess cash primarily in money market funds and highly liquid marketable securities such as commercial paper, corporate debt securities, municipal securities and U.S. government securities. The Company considers all investments with maturities of three months or less when purchased to be cash equivalents. Marketable securities represent commercial paper, U.S. government agency securities, corporate debt securities, municipal securities and U.S. government securities with maturities greater than 90 days at date of purchase. Cash equivalents are stated at amounts that approximate fair value based on quoted market prices. Marketable securities are recorded at their fair values. Marketable securities with maturities greater than one year are classified as current because management considers all marketable securities to be available for current operations. The Company’s investments have been classified and accounted for as available-for-sale. Such investments are recorded at fair value and unrealized holding gains and losses are reported as a separate component of accumulated other comprehensive loss in the stockholders’ equity until realized. Realized gains and losses on sales of marketable securities, if any, are determined on the specific identification method and are reclassified from accumulated other comprehensive loss to results of operations as other expense, net. There were no realized gains and losses for the three and nine months ended October 1, 2022 and October 2, 2021, respectively. Cash, cash equivalents and marketable securities consisted of the following (in thousands): October 1, December 31, Cash and cash equivalents: Cash $ 33,807 $ 26,442 Commercial paper 34,377 21,582 U.S. government securities 6,966 — Money market funds 22 2,320 Corporate debt securities — 989 Total cash and cash equivalents 75,172 51,333 Marketable securities: U.S. government securities 109,548 60,279 Commercial paper 28,953 80,812 U.S. government agency securities 20,533 5,527 Corporate debt securities 249 3,576 Municipal securities 251 2,808 Total marketable securities 159,534 153,002 $ 234,706 $ 204,335 The carrying amounts of the Company’s money market funds approximate their fair values due to their nature, duration and short maturities. The amortized cost and fair value of marketable securities as of October 1, 2022 were as follows (in thousands): Amortized Cost Gross Unrealized Losses Fair Value U.S. government securities $ 118,340 $ (1,826) $ 116,514 Commercial paper 63,405 (75) 63,330 U.S. government agency securities 20,763 (230) 20,533 Municipal securities 252 (1) 251 Corporate debt securities 251 (2) 249 Total marketable securities $ 203,011 $ (2,134) $ 200,877 Unrealized gains and losses were de minimis as of December 31, 2021.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Oct. 01, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Company measures its cash equivalents and marketable securities at fair value on a recurring basis. Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. The Company utilizes the following three-tier value hierarchy, which prioritizes the inputs used in measuring fair value: Level 1 – Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. Level 2 – Observable inputs other than quoted prices included in Level 1 for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-driven valuations in which all significant inputs and significant value drivers are observable in active markets. Level 3 – Unobservable inputs to the valuation derived from fair valuation techniques in which one or more significant inputs or significant value drivers are unobservable. The fair value hierarchy also requires the Company to maximize the use of observable inputs, when available, and to minimize the use of unobservable inputs when determining inputs and determining fair value. The following tables sets forth the Company’s financial assets measured at fair value on a recurring basis based on the three-tier fair value hierarchy (in thousands): As of October 1, 2022 Level 1 Level 2 Total Money market funds $ 22 $ — $ 22 U.S. government securities 116,514 — 116,514 Commercial paper — 63,330 63,330 U.S. government agency securities — 20,533 20,533 Municipal securities — 251 251 Corporate debt securities — 249 249 $ 116,536 $ 84,363 $ 200,899 As of December 31, 2021 Level 1 Level 2 Total Money market funds $ 2,320 $ — $ 2,320 U.S. government securities 60,279 — 60,279 Commercial paper — 102,394 102,394 U.S. government agency securities — 5,527 5,527 Corporate debt securities — 4,565 4,565 Municipal securities — 2,808 2,808 $ 62,599 $ 115,294 $ 177,893

Balance Sheet Details

Balance Sheet Details	9 Months Ended
	Oct. 01, 2022
Balance Sheet Related Disclosures [Abstract]
Balance Sheet Details	Balance Sheet Details Accounts receivable, net consisted of the following (in thousands): October 1, December 31, Accounts receivable $ 101,220 $ 85,944 Allowance for doubtful accounts (693) (725) $ 100,527 $ 85,219 Inventory consisted of the following (in thousands): October 1, December 31, Raw materials $ 804 $ 130 Finished goods 140,312 88,750 $ 141,116 $ 88,880 Property and equipment, net consisted of the following (in thousands): October 1, December 31, Test equipment $ 43,660 $ 39,476 Computer equipment 12,024 11,156 Software 9,859 9,013 Leasehold improvements 1,704 1,351 Furniture and fixtures 1,140 1,812 Total 68,387 62,808 Accumulated depreciation and amortization (44,039) (41,025) $ 24,348 $ 21,783 Accrued liabilities consisted of the following (in thousands): October 1, December 31, Compensation and related benefits $ 16,262 $ 23,165 Component inventory held by suppliers 10,290 7,611 Current portion of revenue share payments 10,284 4,731 Professional and consulting fees 6,993 4,819 Current portion of warranty and retrofit 6,559 7,076 Customer advances or rebates 6,220 4,742 Taxes payable 6,154 4,251 Freight 3,952 3,997 Operating leases 3,853 3,596 Product returns 2,722 1,836 Operations 1,577 1,400 Other 5,707 4,373 $ 80,573 $ 71,597 In March 2018, and as amended in December 2020, the Company entered into an agreement with a vendor to develop a certain software product and related enhancements pursuant to which the Company is obligated to make revenue-share payments under the program, subject to aggregate fixed revenue-share payments of $15.8 million. The payments are based on a revenue-share rate applied to revenue from the developed-product and the corresponding hardware sales through March 2024. If the minimum revenue-share payments are not achieved by the end of that period, a true-up payment will be due. As of October 1, 2022, the liability, including accrued interest, was $12.7 million, of which $10.3 million is included in “Accrued liabilities” and $2.4 million in “Other long-term liabilities” in the accompanying Condensed Consolidated Balance Sheet. As of December 31, 2021, the liability, including accrued interest, was $13.2 million, of which $4.7 million was included in “Accrued liabilities” and $8.5 million in other “Other long-term liabilities.” Changes in the Company’s accrued warranty and retrofit liability were as follows (in thousands): Three Months Ended Nine Months Ended October 1, October 2, October 1, October 2, Balance at beginning of period $ 8,654 $ 9,911 $ 9,594 $ 9,208 Accruals for product warranty and retrofit 219 769 396 2,974 Cost of warranty and retrofit claims (566) (554) (1,683) (2,056) Balance at end of period $ 8,307 $ 10,126 $ 8,307 $ 10,126

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Oct. 01, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Lease Commitments The Company leases office space under non-cancelable operating leases. Certain of the Company’s operating leases contain renewal options and rent acceleration clauses. Future minimum payments under the non-cancelable operating leases consisted of the following as of October 1, 2022 (in thousands): Period Future Minimum Lease Payments Remainder of 2022 $ 1,136 2023 4,619 2024 4,448 2025 3,945 2026 and thereafter 530 Total future minimum lease payments 14,678 Less imputed interest (1,382) $ 13,296 As of October 1, 2022, the operating lease liability consisted of the following (in thousands): Accrued liabilities - current portion of operating leases $ 3,853 Operating leases 9,443 $ 13,296 The Company leases its headquarters office space in San Jose, California under a lease agreement that expires in December 2025. The future minimum lease payments under the lease are $7.9 million and are included in the table above. The weighted average discount rate for the Company’s operating leases as of October 1, 2022 was 6.1%. The weighted average remaining lease term as of October 1, 2022 was 3.2 years. For the three and nine months ended October 1, 2022, total rent expense of the Company was $1.0 million and $3.2 million, respectively. For the three and nine months ended October 2, 2021, total rent expense of the Company was $1.0 million and $3.1 million, respectively. Cash paid within operating cash flows for operating leases was $3.4 million and $2.9 million for the nine months ended October 1, 2022 and October 2, 2021, respectively. Purchase Commitments The Company’s suppliers, including contract manufacturers (“CMs”) and original design manufacturers (“ODMs”), place orders for certain component inventory in advance based upon the Company’s build forecasts in order to reduce manufacturing lead times and ensure adequate component supply. The components are used by the CMs and ODMs to build the products included in the build forecasts. The Company generally does not take ownership of the components held by CMs and ODMs. The Company places purchase orders with its CMs and ODMs in order to fulfill its monthly finished product inventory requirements. The Company incurs a liability when the CMs and ODMs convert the component inventory to a finished product and takes ownership of the finished goods inventory. In the event of termination of services with a manufacturing partner, the Company has purchased, and may be required to purchase in the future, certain of the remaining components inventory held by the CM or ODM as well as any outstanding orders pursuant to the contractual provisions with such CM or ODM. As of October 1, 2022 and December 31, 2021, the Company had approximately $398.8 million and $247.3 million, respectively, of outstanding purchase commitments for inventories to be delivered by its suppliers, including CMs and ODMs. The Company has from time to time, and subject to certain conditions, reimbursed certain suppliers for component inventory purchases when this inventory has been rendered excess or obsolete, for example due to manufacturing and engineering change orders resulting from design changes, manufacturing discontinuation of products by its suppliers, or in cases where the Company has committed inventory levels that greatly exceed projected demand. The estimated excess and obsolete inventory liabilities related to such manufacturing and engineering change orders and other factors, which are included in accrued liabilities in the accompanying balance sheets, were $10.3 million and $7.6 million as of October 1, 2022 and December 31, 2021, respectively. The Company records the related charges in cost of systems revenue in its Condensed Consolidated Statements of Comprehensive Income. Litigation From time to time, the Company is involved in various legal proceedings arising from the normal course of business activities. The Company is not currently a party to any legal proceedings that, if determined adversely to the Company, in management’s opinion, are currently expected to individually or in the aggregate have a material adverse effect on the Company’s business, operating results or financial condition taken as a whole.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Oct. 01, 2022
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders’ Equity 2019 Equity Incentive Award Plan Employees and consultants of the Company, its subsidiaries and affiliates, as well as members of the Company’s Board of Directors, are eligible to receive awards under the 2019 Equity Incentive Award Plan (“the 2019 Plan”). The 2019 Plan provides for the grant of stock options, including incentive stock options and nonqualified stock options, stock appreciation rights, restricted stock, restricted stock units, other stock or cash-based awards and dividend equivalents to eligible individuals. At the Company’s 2022 annual meeting of stockholders, the stockholders approved an increase in the number of shares of common stock issuable under the 2019 Plan by 1.5 million shares. As of October 1, 2022, there were 6.7 million shares available for issuance under the 2019 Plan. Stock Options During the three months ended October 1, 2022, stock option awards exercisable for up to an aggregate of 0.3 million shares of common stock were granted with a grant date weighted-average exercise price of $56.21 per share. During the nine months ended October 1, 2022, stock option awards exercisable for up to an aggregate of 1.1 million shares of common stock were granted with a grant date weighted-average exercise price of $46.83 per share. These stock option awards vest 25% on the first anniversary of the vesting commencement date and on a quarterly basis thereafter over an additional three years. In February 2022, performance-based stock option awards exercisable for up to an aggregate of 0.7 million shares of common stock were granted to certain Company executives with a grant date exercise price of $55.96 per share. The actual number of shares earned is contingent upon achievement of annual corporate financial targets for bookings and non-GAAP net operating income for 2022 (collectively, the “2022 Performance Targets”) during the one-year performance period. These performance-based stock option awards will vest, subject to certification by the Compensation Committee of the Company’s Board of Directors upon the achievement of the 2022 Performance Targets, as to 25% of the shares of common stock earned on the one year anniversary of the date of grant, and as to the remaining 75% of the shares of common stock earned, in substantially equal quarterly installments over the subsequent 36 months, subject to the executive’s continuous service with the Company through the respective vesting dates. If the non-GAAP net operating income target is achieved below 80% of target or the bookings target is achieved below 90% of target, no shares would be awarded, and the performance-based stock option awards would be forfeited in full. If both targets are achieved at the minimum threshold of 80% of target for non-GAAP net operating income and 90% of target for bookings, then the shares are awarded at 50% of the granted shares, with an increasing percentage of shares awarded above the minimum thresholds up to 100% of the granted shares if both targets are achieved at 100% or more of target. The probability of meeting the performance conditions related to these performance-based stock option awards was assessed to be probable as of October 1, 2022, and stock-based compensation expense of $2.9 million was recognized for the three months ended October 1, 2022. For the nine months ended October 1, 2022, stock-based compensation expense of $7.4 million was recognized. During the three months ended October 1, 2022, 46,000 shares of common stock were issued pursuant to the exercise of stock options at a weighted-average exercise price of $23.18 per share. During the nine months ended October 1, 2022, 0.6 million shares of common stock were issued pursuant to the exercise of stock options at a weighted-average exercise price of $8.86 per share. As of October 1, 2022, unrecognized stock-based compensation expense of $55.7 million related to stock options, net of estimated forfeitures, is expected to be recognized over a weighted-average period of 2.2 years. Employee Stock Purchase Plans The Company maintains two employee stock purchase plans - the Amended and Restated Employee Stock Purchase Plan (the “ESPP”) and the Amended and Restated 2017 Nonqualified Employee Stock Purchase Plan (the “NQ ESPP”). The ESPP allows eligible employees to purchase shares of the Company’s common stock through payroll deductions of up to 15% of their eligible compensation subject to certain Internal Revenue Code limitations. In addition, participants may purchase up to 2,000 shares of common stock during each offering period. The offering periods under the ESPP are two six-month offering periods from August 15 th through February 14 th and February 15 th through August 14 th of each year. The price of common stock purchased under the ESPP is 85% of the lower of the fair market value of the common stock on the commencement date and the end date of each six-month offering period. At the Company’s 2022 annual meeting of stockholders, the stockholders approved an increase in the number of shares of common stock issuable under the ESPP by 1.3 million shares. The total shares authorized for issuance under the ESPP increased from 11.1 million shares to 12.4 million shares. As of October 1, 2022, there were 4.7 million shares available for issuance under the ESPP. During the nine months ended October 1, 2022, 0.2 million shares were purchased under the ESPP. As of October 1, 2022, unrecognized stock-based compensation expense of $1.3 million related to the ESPP is expected to be recognized over a remaining service period of 0.4 years. The NQ ESPP allows eligible employees to purchase shares of the Company’s common stock through payroll deductions of up to 25% of their eligible compensation. Eligible employees have the right to (a) purchase the maximum number of whole shares of common stock that can be purchased with the elected payroll deductions during each offering period for which the employee is enrolled at a purchase price equal to the closing price of the Company’s common stock on the last day of such offering period and (b) receive an equal number of shares of the Company’s common stock that are subject to a risk of forfeiture in the event the employee terminates employment within the one year period immediately following the purchase date. Beginning in the second quarter of 2022, the NQ ESPP provides quarterly offering periods from February 8 th through May 7 th , May 8 th through August 7 th , August 8 th through November 7 th and November 8 th through February 7 th of each year. A transition period began on May 15 th and ended on August 7 th . At the Company’s 2022 annual meeting of stockholders, the stockholders approved an increase in the number of shares of common stock issuable under the NQ ESPP by 0.8 million shares. The maximum number of shares of common stock currently authorized for issuance under the NQ ESPP is 6.3 million shares, with a maximum of 0.5 million shares allocated per purchase period. As of October 1, 2022, there were 3.2 million shares available for issuance under the NQ ESPP, including the stockholder-approved 0.8 million share increase. During the nine months ended October 1, 2022, 0.5 million shares were purchased and issued. As of October 1, 2022, unrecognized stock-based compensation expense of $8.2 million related to the NQ ESPP is expected to be recognized over a remaining weighted-average service period of 0.9 years. Stock-Based Compensation The following table summarizes stock-based compensation expense (in thousands): Three Months Ended Nine Months Ended October 1, October 2, October 1, October 2, Cost of revenue: Products $ 432 $ 211 $ 1,225 $ 559 Services 266 177 739 483 Sales and marketing 3,082 1,791 8,412 4,961 Research and development 2,808 1,803 8,812 5,031 General and administrative 4,439 2,679 12,314 7,021 $ 11,027 $ 6,661 $ 31,502 $ 18,055 Stock Repurchase Program In July 2022, the Company’s Board of Directors authorized a one-year stock repurchase program for up to $100 million of the Company’s common stock. Under the repurchase program, repurchases can be made from time to time using a variety of methods, which may include open market purchases, privately negotiated transactions or otherwise, all in accordance with the rules of the SEC and other applicable legal requirements. The specific timing, price and size of the purchases will depend on prevailing stock prices, general economic and market conditions, and other considerations consistent with the Company’s capital allocation strategy. The repurchase program does not obligate the Company to acquire a particular amount of common stock, and the repurchase program may be suspended or discontinued at any time at the Company’s discretion. During the three months ended October 1, 2022, no repurchases were made under the program.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	9 Months Ended
	Oct. 01, 2022
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	Revenue from Contracts with Customers The Company derives revenue from contracts with customers primarily from the following and categorizes its revenue as follows: • Systems include revenue from the sale of access and premises systems, software platform licenses and cloud-based software subscriptions; and • Services include revenue from customer support, software- and cloud-based maintenance, extended warranty subscriptions, professional services, training and managed services. The following is a summary of revenue disaggregated by geographic region based upon the location of the customers (in thousands): Three Months Ended Nine Months Ended October 1, 2022 October 2, 2021 October 1, 2022 October 2, 2021 United States $ 215,857 $ 136,312 $ 565,420 $ 414,246 Americas ex U.S. 11,557 11,800 31,236 37,660 Europe 7,178 19,443 16,705 32,701 Middle East & Africa 1,223 3,905 8,940 16,165 Asia Pacific 519 771 1,023 2,203 $ 236,334 $ 172,231 $ 623,324 $ 502,975 Contract Asset The primary contract asset is revenue recognized on professional services contracts where the services are transferred to the customer over time, which has yet to be billed, and is classified within accounts receivable. Amounts are billed in accordance with the agreed-upon contractual terms. The balance as of December 31, 2021 was $1.7 million of which $0.3 million remained in the Company’s Condensed Consolidated Balance Sheet as of October 1, 2022. The closing balance as of October 1, 2022 was $2.0 million of which the Company expects to bill 26% of the balance during the remainder of 2022. The contract asset balance may fluctuate depending on the timing of professional services contracts with the Company's customers. Contract Liability Deferred revenue consisted of the following (in thousands): October 1, December 31, Current: Products and services $ 28,713 $ 22,586 Extended warranty 4,974 4,892 33,687 27,478 Long-term: Products and services 6,477 3,137 Extended warranty 18,442 18,879 24,919 22,016 $ 58,606 $ 49,494 The increase in the deferred revenue balance for the three and nine months ended October 1, 2022 is primarily driven by cash payments received or due in advance of satisfying the Company’s performance obligations offset by $13.0 million and $23.2 million of revenue recognized that was included in the deferred revenue balance at the beginning of each period, respectively. Revenue allocated to remaining performance obligations (“RPOs”) represents contract revenue that has not yet been recognized, which includes deferred revenue and amounts that will be invoiced and recognized as revenue in future periods but excludes variable consideration where the monthly invoicing is based on usage or where actual usage exceeds the minimum commitment. RPOs were $173.1 million as of October 1, 2022, and the Company expects to recognize as revenue 35% of this amount over the next 12 months and the remainder thereafter. Contract Costs The Company capitalizes certain sales commissions related primarily to multi-year subscriptions and extended warranty support for which the expected amortization period is greater than one year. As of October 1, 2022 and December 31, 2021, the unamortized balance of deferred commissions was $8.5 million and $7.4 million, respectively. For the three and nine months ended October 1, 2022, the amount of amortization was $1.0 million and $2.6 million, respectively, compared to $0.4 million and $0.7 million for the three and nine months ended October 2, 2021, respectively. There was no impairment loss in relation to the costs capitalized for either period. Concentration of Customer Risk No customer accounted for more than 10% of the Company’s total revenue for the three or nine months ended October 1, 2022. One customer represented 10% of the Company’s total revenue for the three months ended October 2, 2021. No customer accounted for more than 10% of the Company’s total revenue for the nine months ended October 2, 2021.

Income Taxes

Income Taxes	9 Months Ended
	Oct. 01, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The following table presents income taxes and the effective tax rates for the periods indicated (in thousands, except percentages): Three Months Ended Nine Months Ended October 1, October 2, October 1, October 2, Income before income taxes $ 20,466 $ 17,442 $ 39,955 $ 58,872 Income taxes $ 7,023 $ (159,982) $ 10,872 $ (159,625) Effective tax rate 34.3 % (917.2) % 27.2 % (271.1) % The Company’s income taxes for the three months ended October 1, 2022 and October 2, 2021 were determined using an estimated effective tax rate adjusted for discrete items that occurred during the respective periods. The Company’s effective tax rate for the three and nine months ended October 1, 2022 differs from the statutory federal corporate tax rate of 21% primarily due to state taxes, the inclusion of income from certain foreign operations and the effect of non-deductible stock-based compensation for executive officers partially offset by U.S. federal research tax credits and excess tax benefits from stock-based compensation. The Company’s effective tax rate for the three and nine months ended October 2, 2021 was significantly lower than 2022 as the Company reversed a significant portion of its valuation allowance associated with the Company’s U.S. federal and certain state deferred tax assets in the third quarter of 2021. The Company has net deferred tax assets that have arisen primarily as a result of temporary differences, net operating loss carryforwards and tax credits. The Company’s ability to realize a deferred tax asset is based on its ability to generate sufficient future taxable income within the applicable carryforward period and subject to any applicable limitations. Management continues to believe that it is more likely than not we will utilize a significant portion of our deferred tax assets. The Company continues to maintain a valuation allowance of $30.9 million on certain U.S. federal and state deferred tax assets that the Company believes are not more likely than not to be realized in future periods. The Company considers scheduled reversals of deferred tax liabilities, projected future taxable income, ongoing tax planning strategies and other matters, including the period over which its deferred tax assets will be recoverable, in assessing the need for and the amount of the valuation allowance. In the event that actual results differ from these estimates, or if the Company decides to adjust these estimates in the future periods, further adjustments to its valuation allowance may be recorded, which could materially impact the Company’s financial position and net income in the period of the adjustment. The Company’s income taxes may be subject to fluctuation during the year and in future years as new information is obtained, which may affect the assumptions used to estimate the annual effective tax rate including factors as actual results differing from its estimates of pre-tax earnings in the various jurisdictions in which the Company operates, which could impact the recognition of its deferred tax assets, benefits from stock option exercises, further investments in the Company’s foreign operations, the recognition or de-recognition of tax benefits related to uncertain tax positions and changes in or the interpretation of tax laws in jurisdictions where the Company conducts business.

Net Income Per Common Share

Net Income Per Common Share	9 Months Ended
	Oct. 01, 2022
Earnings Per Share [Abstract]
Net Income Per Common Share	Net Income Per Common Share The following table sets forth the computation of basic and diluted net income per common share for the periods indicated (in thousands, except per share data): Three Months Ended Nine Months Ended October 1, October 2, October 1, October 2, Numerator: Net income $ 13,443 $ 177,424 $ 29,083 $ 218,497 Denominator: Weighted-average common shares outstanding used to compute basic net income per share 65,355 63,588 64,892 63,057 Effect of dilutive common stock equivalents 3,819 4,319 3,695 4,480 Weighted-average common shares outstanding used to compute diluted net income per share 69,174 67,907 68,587 67,537 Net income per common share: Basic net income per common share $ 0.21 $ 2.79 $ 0.45 $ 3.47 Diluted net income per common share $ 0.19 $ 2.61 $ 0.42 $ 3.24 Potentially dilutive shares, weighted average 1,724 1,224 1,803 908 Potentially dilutive shares have been excluded from the computation of diluted net income per common share when their effect is antidilutive. These antidilutive shares were from stock options.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	9 Months Ended
	Oct. 01, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements, including the accounts of Calix, Inc. and its wholly-owned subsidiaries, have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission (“SEC”) for interim reporting. As permitted under those rules, certain footnotes or other financial information that are normally required by U.S. generally accepted accounting principles (“GAAP”) can be condensed or omitted. In the opinion of management, the financial statements include all normal and recurring adjustments that are considered necessary for the fair presentation of the Company’s financial position and operating results. All intercompany balances and transactions have been eliminated in consolidation. The Condensed Consolidated Balance Sheet as of December 31, 2021 has been derived from the audited financial statements at that date. The results of the Company’s operations can vary during each quarter of the year. Therefore, the results and trends in these interim financial statements may not be the same as those for the full year or any future periods. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the audited financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. The Company’s fiscal year begins on January 1 st and ends on December 31 st . Quarterly periods are based on a 4-4-5 calendar with the first quarter ending on the Saturday closest to March 31 st . As a result, the Company had one less day in the nine months ended October 1, 2022 than for the nine months ended October 2, 2021. The preparation of financial statements in conformity with GAAP for interim financial reporting requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Actual results could differ from those estimates.
Newly Adopted Accounting Standard and Recent Accounting Pronouncements Not Yet Adopted	Newly Adopted Accounting Standard The Company did not adopt any new accounting standards during the nine months ended October 1, 2022 that were significant to the Company. Recent Accounting Pronouncements Not Yet Adopted There have been no additional accounting pronouncements or changes in accounting pronouncements during the nine months ended October 1, 2022 as compared to the recent accounting pronouncements described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021, that are significant or potentially significant to the Company.
Revenue Recognition	The Company derives revenue from contracts with customers primarily from the following and categorizes its revenue as follows: • Systems include revenue from the sale of access and premises systems, software platform licenses and cloud-based software subscriptions; and • Services include revenue from customer support, software- and cloud-based maintenance, extended warranty subscriptions, professional services, training and managed services.

Cash, Cash Equivalents and Rest

Cash, Cash Equivalents and Restricted Cash (Tables)	9 Months Ended
	Oct. 01, 2022
Cash and Cash Equivalents [Abstract]
Summary of cash and cash equivalents	Cash, cash equivalents and marketable securities consisted of the following (in thousands): October 1, December 31, Cash and cash equivalents: Cash $ 33,807 $ 26,442 Commercial paper 34,377 21,582 U.S. government securities 6,966 — Money market funds 22 2,320 Corporate debt securities — 989 Total cash and cash equivalents 75,172 51,333 Marketable securities: U.S. government securities 109,548 60,279 Commercial paper 28,953 80,812 U.S. government agency securities 20,533 5,527 Corporate debt securities 249 3,576 Municipal securities 251 2,808 Total marketable securities 159,534 153,002 $ 234,706 $ 204,335
Debt securities, available-for-sale	The amortized cost and fair value of marketable securities as of October 1, 2022 were as follows (in thousands): Amortized Cost Gross Unrealized Losses Fair Value U.S. government securities $ 118,340 $ (1,826) $ 116,514 Commercial paper 63,405 (75) 63,330 U.S. government agency securities 20,763 (230) 20,533 Municipal securities 252 (1) 251 Corporate debt securities 251 (2) 249 Total marketable securities $ 203,011 $ (2,134) $ 200,877

Fair Value Measures and Disclos

Fair Value Measures and Disclosures (Tables)	9 Months Ended
	Oct. 01, 2022
Fair Value Disclosures [Abstract]
Fair value, assets measured on recurring basis	The following tables sets forth the Company’s financial assets measured at fair value on a recurring basis based on the three-tier fair value hierarchy (in thousands): As of October 1, 2022 Level 1 Level 2 Total Money market funds $ 22 $ — $ 22 U.S. government securities 116,514 — 116,514 Commercial paper — 63,330 63,330 U.S. government agency securities — 20,533 20,533 Municipal securities — 251 251 Corporate debt securities — 249 249 $ 116,536 $ 84,363 $ 200,899 As of December 31, 2021 Level 1 Level 2 Total Money market funds $ 2,320 $ — $ 2,320 U.S. government securities 60,279 — 60,279 Commercial paper — 102,394 102,394 U.S. government agency securities — 5,527 5,527 Corporate debt securities — 4,565 4,565 Municipal securities — 2,808 2,808 $ 62,599 $ 115,294 $ 177,893

Balance Sheet Details (Tables)

Balance Sheet Details (Tables)	9 Months Ended
	Oct. 01, 2022
Balance Sheet Related Disclosures [Abstract]
Summary of accounts receivable, net	Accounts receivable, net consisted of the following (in thousands): October 1, December 31, Accounts receivable $ 101,220 $ 85,944 Allowance for doubtful accounts (693) (725) $ 100,527 $ 85,219
Summary of inventory	Inventory consisted of the following (in thousands): October 1, December 31, Raw materials $ 804 $ 130 Finished goods 140,312 88,750 $ 141,116 $ 88,880
Summary of property and equipment, net	Property and equipment, net consisted of the following (in thousands): October 1, December 31, Test equipment $ 43,660 $ 39,476 Computer equipment 12,024 11,156 Software 9,859 9,013 Leasehold improvements 1,704 1,351 Furniture and fixtures 1,140 1,812 Total 68,387 62,808 Accumulated depreciation and amortization (44,039) (41,025) $ 24,348 $ 21,783
Summary of accrued liabilities	Accrued liabilities consisted of the following (in thousands): October 1, December 31, Compensation and related benefits $ 16,262 $ 23,165 Component inventory held by suppliers 10,290 7,611 Current portion of revenue share payments 10,284 4,731 Professional and consulting fees 6,993 4,819 Current portion of warranty and retrofit 6,559 7,076 Customer advances or rebates 6,220 4,742 Taxes payable 6,154 4,251 Freight 3,952 3,997 Operating leases 3,853 3,596 Product returns 2,722 1,836 Operations 1,577 1,400 Other 5,707 4,373 $ 80,573 $ 71,597
Product warranty activities	Changes in the Company’s accrued warranty and retrofit liability were as follows (in thousands): Three Months Ended Nine Months Ended October 1, October 2, October 1, October 2, Balance at beginning of period $ 8,654 $ 9,911 $ 9,594 $ 9,208 Accruals for product warranty and retrofit 219 769 396 2,974 Cost of warranty and retrofit claims (566) (554) (1,683) (2,056) Balance at end of period $ 8,307 $ 10,126 $ 8,307 $ 10,126

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Oct. 01, 2022
Commitments and Contingencies Disclosure [Abstract]
Schedule of future minimum rental payments for operating leases	Future minimum payments under the non-cancelable operating leases consisted of the following as of October 1, 2022 (in thousands): Period Future Minimum Lease Payments Remainder of 2022 $ 1,136 2023 4,619 2024 4,448 2025 3,945 2026 and thereafter 530 Total future minimum lease payments 14,678 Less imputed interest (1,382) $ 13,296
Lessee, operating lease liability	As of October 1, 2022, the operating lease liability consisted of the following (in thousands): Accrued liabilities - current portion of operating leases $ 3,853 Operating leases 9,443 $ 13,296

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Oct. 01, 2022
Stockholders' Equity Note [Abstract]
Disclosure of share-based compensation arrangements by share-based payment award	The following table summarizes stock-based compensation expense (in thousands): Three Months Ended Nine Months Ended October 1, October 2, October 1, October 2, Cost of revenue: Products $ 432 $ 211 $ 1,225 $ 559 Services 266 177 739 483 Sales and marketing 3,082 1,791 8,412 4,961 Research and development 2,808 1,803 8,812 5,031 General and administrative 4,439 2,679 12,314 7,021 $ 11,027 $ 6,661 $ 31,502 $ 18,055

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
	Oct. 01, 2022
Revenue from Contract with Customer [Abstract]
Revenue from external customers by geographic areas	The following is a summary of revenue disaggregated by geographic region based upon the location of the customers (in thousands): Three Months Ended Nine Months Ended October 1, 2022 October 2, 2021 October 1, 2022 October 2, 2021 United States $ 215,857 $ 136,312 $ 565,420 $ 414,246 Americas ex U.S. 11,557 11,800 31,236 37,660 Europe 7,178 19,443 16,705 32,701 Middle East & Africa 1,223 3,905 8,940 16,165 Asia Pacific 519 771 1,023 2,203 $ 236,334 $ 172,231 $ 623,324 $ 502,975
Deferred revenue, by arrangement, disclosure	Deferred revenue consisted of the following (in thousands): October 1, December 31, Current: Products and services $ 28,713 $ 22,586 Extended warranty 4,974 4,892 33,687 27,478 Long-term: Products and services 6,477 3,137 Extended warranty 18,442 18,879 24,919 22,016 $ 58,606 $ 49,494

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Oct. 01, 2022
Income Tax Disclosure [Abstract]
Schedule of income taxes	The following table presents income taxes and the effective tax rates for the periods indicated (in thousands, except percentages): Three Months Ended Nine Months Ended October 1, October 2, October 1, October 2, Income before income taxes $ 20,466 $ 17,442 $ 39,955 $ 58,872 Income taxes $ 7,023 $ (159,982) $ 10,872 $ (159,625) Effective tax rate 34.3 % (917.2) % 27.2 % (271.1) %

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	9 Months Ended
	Oct. 01, 2022
Earnings Per Share [Abstract]
Schedule of net income (loss) per share	The following table sets forth the computation of basic and diluted net income per common share for the periods indicated (in thousands, except per share data): Three Months Ended Nine Months Ended October 1, October 2, October 1, October 2, Numerator: Net income $ 13,443 $ 177,424 $ 29,083 $ 218,497 Denominator: Weighted-average common shares outstanding used to compute basic net income per share 65,355 63,588 64,892 63,057 Effect of dilutive common stock equivalents 3,819 4,319 3,695 4,480 Weighted-average common shares outstanding used to compute diluted net income per share 69,174 67,907 68,587 67,537 Net income per common share: Basic net income per common share $ 0.21 $ 2.79 $ 0.45 $ 3.47 Diluted net income per common share $ 0.19 $ 2.61 $ 0.42 $ 3.24 Potentially dilutive shares, weighted average 1,724 1,224 1,803 908

Cash, Cash Equivalents, and M_2

Cash, Cash Equivalents, and Marketable Securities - Summary of Cash and Cash Equivalents (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021	Dec. 31, 2021
Cash and Cash Equivalents [Line Items]
Realized gains and losses on marketable securities	$ 0	$ 0	$ 0	$ 0
Total cash and cash equivalents	75,172,000		75,172,000		$ 51,333,000
Marketable securities	159,534,000		159,534,000		153,002,000
Total cash, cash equivalents, and marketable securities	234,706,000		234,706,000		204,335,000
U.S. government securities | Short-Term Marketable Securities
Cash and Cash Equivalents [Line Items]
Marketable securities	109,548,000		109,548,000		60,279,000
Commercial paper
Cash and Cash Equivalents [Line Items]
Marketable securities	28,953,000		28,953,000		80,812,000
U.S. government agency securities
Cash and Cash Equivalents [Line Items]
Marketable securities	20,533,000		20,533,000		5,527,000
U.S. government agency securities | Short-Term Marketable Securities
Cash and Cash Equivalents [Line Items]
Marketable securities	20,533,000		20,533,000
Corporate debt securities
Cash and Cash Equivalents [Line Items]
Marketable securities	249,000		249,000		3,576,000
Corporate debt securities | Short-Term Marketable Securities
Cash and Cash Equivalents [Line Items]
Marketable securities	249,000		249,000
Municipal securities
Cash and Cash Equivalents [Line Items]
Marketable securities	251,000		251,000		2,808,000
Municipal securities | Short-Term Marketable Securities
Cash and Cash Equivalents [Line Items]
Marketable securities	251,000		251,000
Cash
Cash and Cash Equivalents [Line Items]
Cash	33,807,000		33,807,000		26,442,000
Commercial paper
Cash and Cash Equivalents [Line Items]
Cash equivalents	34,377,000		34,377,000		21,582,000
U.S. government securities
Cash and Cash Equivalents [Line Items]
Cash equivalents	6,966,000		6,966,000		0
Money market funds
Cash and Cash Equivalents [Line Items]
Cash equivalents	22,000		22,000		2,320,000
Corporate debt securities
Cash and Cash Equivalents [Line Items]
Cash equivalents	$ 0		$ 0		$ 989,000

Cash, Cash Equivalents, and M_3

Cash, Cash Equivalents, and Marketable Securities - Schedule of Marketable Securities (Details) - USD ($) $ in Thousands	Oct. 01, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 159,534	$ 153,002
Short-Term Marketable Securities And Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	203,011
Gross Unrealized Losses	(2,134)
Fair Value	200,877
U.S. government securities | Short-Term Marketable Securities And Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	118,340
Gross Unrealized Losses	(1,826)
Fair Value	116,514
U.S. government securities | Short-Term Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	109,548	60,279
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Fair Value	28,953	80,812
Commercial paper | Short-Term Marketable Securities And Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	63,405
Gross Unrealized Losses	(75)
Fair Value	63,330
U.S. government agency securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	20,533	5,527
U.S. government agency securities | Short-Term Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	20,763
Gross Unrealized Losses	(230)
Fair Value	20,533
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	251	2,808
Municipal securities | Short-Term Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	252
Gross Unrealized Losses	(1)
Fair Value	251
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	249	$ 3,576
Corporate debt securities | Short-Term Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	251
Gross Unrealized Losses	(2)
Fair Value	$ 249

Fair Value Measures and Discl_2

Fair Value Measures and Disclosures (Details) - USD ($) $ in Thousands	Oct. 01, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	$ 159,534	$ 153,002
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	28,953	80,812
U.S. government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	20,533	5,527
Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	251	2,808
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	249	3,576
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	200,899	177,893
Fair Value, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	116,536	62,599
Fair Value, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	84,363	115,294
Fair Value, Recurring | U.S. government securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	116,514	60,279
Fair Value, Recurring | U.S. government securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	116,514	60,279
Fair Value, Recurring | U.S. government securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Fair Value, Recurring | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	63,330	102,394
Fair Value, Recurring | Commercial paper | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Fair Value, Recurring | Commercial paper | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	63,330	102,394
Fair Value, Recurring | U.S. government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	20,533	5,527
Fair Value, Recurring | U.S. government agency securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Fair Value, Recurring | U.S. government agency securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	20,533	5,527
Fair Value, Recurring | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	251	2,808
Fair Value, Recurring | Municipal securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Fair Value, Recurring | Municipal securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	251	2,808
Fair Value, Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	249	4,565
Fair Value, Recurring | Corporate debt securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Fair Value, Recurring | Corporate debt securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	249	4,565
Fair Value, Recurring | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	22	2,320
Fair Value, Recurring | Money market funds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	22	2,320
Fair Value, Recurring | Money market funds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	$ 0	$ 0

Balance Sheet Details - Account

Balance Sheet Details - Accounts Receivable (Details) - USD ($) $ in Thousands	Oct. 01, 2022	Dec. 31, 2021
Summary of accounts receivable, net
Accounts receivable	$ 101,220	$ 85,944
Allowance for doubtful accounts	(693)	(725)
Accounts receivable, net	$ 100,527	$ 85,219

Balance Sheet Details - Invento

Balance Sheet Details - Inventory (Details) - USD ($) $ in Thousands	Oct. 01, 2022	Dec. 31, 2021
Summary of inventory, net
Raw materials	$ 804	$ 130
Finished goods	140,312	88,750
Total inventory	$ 141,116	$ 88,880

Balance Sheet Details - Propert

Balance Sheet Details - Property and Equipment, net (Details) - USD ($) $ in Thousands	Oct. 01, 2022	Dec. 31, 2021
Summary of property and equipment, net
Property and equipment, gross	$ 68,387	$ 62,808
Accumulated depreciation and amortization	(44,039)	(41,025)
Property and equipment, net	24,348	21,783
Test equipment
Summary of property and equipment, net
Property and equipment, gross	43,660	39,476
Computer equipment
Summary of property and equipment, net
Property and equipment, gross	12,024	11,156
Software
Summary of property and equipment, net
Property and equipment, gross	9,859	9,013
Leasehold improvements
Summary of property and equipment, net
Property and equipment, gross	1,704	1,351
Furniture and fixtures
Summary of property and equipment, net
Property and equipment, gross	$ 1,140	$ 1,812

Balance Sheet Details - Narrati

Balance Sheet Details - Narrative (Details) - USD ($) $ in Thousands	Oct. 01, 2022	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Accrued liabilities	$ 80,573	$ 71,597
Other long-term liabilities	4,264	11,076
Licensed Software
Finite-Lived Intangible Assets [Line Items]
Royalty payment commitment			$ 15,800
Other Liabilities	12,700	13,200
Accrued liabilities	10,300	4,700
Other long-term liabilities	$ 2,400	$ 8,500

Balance Sheet Details - Accrued

Balance Sheet Details - Accrued Liabilities (Details) - USD ($) $ in Thousands	Oct. 01, 2022	Dec. 31, 2021
Summary of accrued liabilities
Compensation and related benefits	$ 16,262	$ 23,165
Component inventory held by suppliers	10,290	7,611
Current portion of revenue share payments	10,284	4,731
Professional and consulting fees	6,993	4,819
Current portion of warranty and retrofit	6,559	7,076
Customer advances or rebates	6,220	4,742
Taxes payable	6,154	4,251
Freight	3,952	3,997
Operating leases	3,853	3,596
Product returns	2,722	1,836
Operations	1,577	1,400
Other	5,707	4,373
Total accrued liabilities	$ 80,573	$ 71,597

Balance Sheet Details - Warrant

Balance Sheet Details - Warranty Reserve (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 8,654	$ 9,911	$ 9,594	$ 9,208
Accruals for product warranty and retrofit	219	769	396	2,974
Cost of warranty and retrofit claims	(566)	(554)	(1,683)	(2,056)
Balance at end of period	$ 8,307	$ 10,126	$ 8,307	$ 10,126

Commitments and Contingencies -

Commitments and Contingencies - Operating Leases (Details) $ in Thousands	Oct. 01, 2022 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remainder of 2022	$ 1,136
2023	4,619
2024	4,448
2025	3,945
2026 and thereafter	530
Total future minimum lease payments	14,678
Less imputed interest	(1,382)
Operating lease liability	$ 13,296

Commitments and Contingencies_2

Commitments and Contingencies - Operating Lease Liability (Details) - USD ($) $ in Thousands	Oct. 01, 2022	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Accrued liabilities - current portion of operating leases	$ 3,853	$ 3,596
Operating leases	9,443	$ 12,376
Operating lease liability	$ 13,296
Operating lease, liability, current, statement of financial position	Accrued Liabilities, Current

Commitments and Contingencies_3

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021	Dec. 31, 2021
Commitments and Contingencies [Line Items]
Total future minimum lease payments	$ 14,678		$ 14,678
Weighted average operating discount rate used to determine the operating lease liability (percent)	6.10%		6.10%
Weighted average remaining lease term for operating lease	3 years 2 months 12 days		3 years 2 months 12 days
Rent expense	$ 1,000	$ 1,000	$ 3,200	$ 3,100
Operating lease, payments			3,400	$ 2,900
Accrued customer rebates/prepayments	10,290		10,290		$ 7,611
Inventories
Commitments and Contingencies [Line Items]
Outstanding purchase commitments	398,800		398,800		$ 247,300
San Jose, California
Commitments and Contingencies [Line Items]
Total future minimum lease payments	$ 7,900		$ 7,900

Stockholders' Equity - 2019 Equ

Stockholders' Equity - 2019 Equity Incentive Award Plan (Details) - 2019 Equity Incentive Award Plan shares in Millions	Oct. 01, 2022 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in the number of shares of common stock issuable	1.5
Shares available for future grant (in shares)	6.7

Stockholders' Equity - Stock Op

Stockholders' Equity - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Feb. 28, 2022	Oct. 01, 2022	Oct. 01, 2022	Oct. 02, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)		300,000	1,100,000
Weighted-average grant date fair value (in dollars per share)		$ 56.21	$ 46.83
Stock-based compensation			$ 31,502	$ 18,055
Stock options exercised (in shares)		46,000	600,000
Weighted-average exercise price per share, stock options (in dollars per share)		$ 23.18	$ 8.86
Unrecognized stock-based compensation expense, stock options		$ 55,700	$ 55,700
Recognition period			2 years 2 months 12 days
2021 Performance Targets | Stock Options | Period One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage			25%
2021 Performance Targets | Stock Options | Period Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
2021 Performance Targets | Performance Based Stock Options | Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)	700,000
Weighted-average grant date fair value (in dollars per share)	$ 55.96
Award performance period	1 year
Net income per share, target achievement performance threshold, percent	80%
Bookings, target achievement performance threshold, percent	90%
Number of shares granted if no-GAAP income below 80% and bookings below 90% of target (in shares)	0
Shares award weighting percent	50%
Target achievement threshold for shares award sliding scale	100%
Stock-based compensation		$ 2,900	$ 7,400
2021 Performance Targets | Performance Based Stock Options | Period One | Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage	25%
2021 Performance Targets | Performance Based Stock Options | Period Two | Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage	75%
Award vesting period	36 months

Stockholders' Equity - Employee

Stockholders' Equity - Employee Stock Purchase Plans (Details) $ in Millions	3 Months Ended	9 Months Ended
	Oct. 01, 2022 USD ($) plan period shares	Oct. 01, 2022 USD ($) plan period shares	Aug. 15, 2022 shares	Jul. 02, 2022 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employee stock purchase plans | plan	2	2
Recognition period		2 years 2 months 12 days
Unrecognized stock-based compensation expense, stock options | $	$ 55.7	$ 55.7
2017 Nonqualified Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in the number of shares of common stock issuable	800,000	800,000
Number of shares authorized (in shares)	6,300,000	6,300,000
Shares available for future grant (in shares)	3,200,000	3,200,000
Recognition period		10 months 24 days
Maximum contribution percent (up to 25%)	25%	25%
Employee termination period following purchase date to receive shares subject to risk of forfeiture		1 year
Number of additional shares authorized (in shares)	800,000
Maximum number of shares allocated per purchase period	500,000	500,000
Number of shares issued (in shares)		500,000
Number of shares purchased (in shares)		500,000
Unrecognized stock-based compensation expense, stock options | $	$ 8.2	$ 8.2
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESPP, maximum employee payroll deduction percentage	15%	15%
ESPP, maximum number of shares per employee (in shares)		2,000
Number of offering periods | period	2	2
Offering period		6 months
ESPP, discounted purchase price percentage		85%
Increase in the number of shares of common stock issuable			1,300,000
Number of shares authorized (in shares)	12,400,000	12,400,000		11,100,000
Shares available for future grant (in shares)	4,700,000	4,700,000
Shares purchased under ESPP (in shares)		200,000
Unrecognized stock-based compensation expense | $	$ 1.3	$ 1.3
Recognition period		4 months 24 days

Stockholders' Equity - Stock-Ba

Stockholders' Equity - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 11,027	$ 6,661	$ 31,502	$ 18,055
Cost of Sales | Products
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	432	211	1,225	559
Cost of Sales | Services
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	266	177	739	483
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	3,082	1,791	8,412	4,961
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	2,808	1,803	8,812	5,031
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 4,439	$ 2,679	$ 12,314	$ 7,021

Stockholders' Equity (Details)

Stockholders' Equity (Details) - Stock Repurchase Program $ in Millions	1 Months Ended
	Jul. 31, 2022 USD ($)
Equity [Abstract]
Stock repurchase program, period authorized	1 year
Stock repurchase program, authorized amount	$ 100

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Disaggregation of Revenue [Line Items]
Total revenues	$ 236,334	$ 172,231	$ 623,324	$ 502,975
United States
Disaggregation of Revenue [Line Items]
Total revenues	215,857	136,312	565,420	414,246
Americas ex U.S.
Disaggregation of Revenue [Line Items]
Total revenues	11,557	11,800	31,236	37,660
Europe
Disaggregation of Revenue [Line Items]
Total revenues	7,178	19,443	16,705	32,701
Middle East & Africa
Disaggregation of Revenue [Line Items]
Total revenues	1,223	3,905	8,940	16,165
Asia Pacific
Disaggregation of Revenue [Line Items]
Total revenues	$ 519	$ 771	$ 1,023	$ 2,203

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Contract Asset and Liability (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 01, 2022	Oct. 01, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Contract with customer, asset	$ 2,000	$ 2,000	$ 1,700
Contract with customer, asset, prior period, not recognized	$ 300	$ 300
Contract with customer, asset, expected to be billed remainder of year, percent	26%	26%
Deferred revenue, current	$ 33,687	$ 33,687	27,478
Deferred revenue, noncurrent	24,919	24,919	22,016
Deferred revenue	58,606	58,606	49,494
Contract with customer, liability, revenue recognized	13,000	23,200
Products and services
Disaggregation of Revenue [Line Items]
Deferred revenue, current	28,713	28,713	22,586
Deferred revenue, noncurrent	6,477	6,477	3,137
Extended warranty
Disaggregation of Revenue [Line Items]
Deferred revenue, current	4,974	4,974	4,892
Deferred revenue, noncurrent	$ 18,442	$ 18,442	$ 18,879

Revenue from Contracts with C_5

Revenue from Contracts with Customers - Performance Obligations (Details) $ in Millions	Oct. 01, 2022 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	$ 173.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-02
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	35%
Performance obligations expected to be satisfied, expected timing	1 year

Revenue from Contracts with C_6

Revenue from Contracts with Customers - Contract Costs (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Capitalized contract cost, gross	$ 8,500,000		$ 8,500,000		$ 7,400,000
Capitalized contract cost, amortization	$ 1,000,000	$ 700,000	2,600,000	$ 400,000
Capitalized contract cost, impairment			$ 0	$ 0

Revenue from Contracts with C_7

Revenue from Contracts with Customers - Concentration Risk (Details) - One Customer - Customer Concentration Risk	3 Months Ended	12 Months Ended
	Oct. 02, 2021	Dec. 31, 2021
Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage		12%
Revenue
Concentration Risk [Line Items]
Concentration risk, percentage	10%

Income Taxes - (Details)

Income Taxes - (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Income Tax Disclosure [Abstract]
Income before income taxes	$ 20,466	$ 17,442	$ 39,955	$ 58,872
Income taxes	$ 7,023	$ (159,982)	$ 10,872	$ (159,625)
Effective tax rate	34.30%	(917.20%)	27.20%	(271.10%)
Valuation allowance	$ 30,900		$ 30,900

Net Income Per Common Share (De

Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Numerator:
Net income	$ 13,443	$ 177,424	$ 29,083	$ 218,497
Denominator:
Weighted-average common shares outstanding used to compute basic net income (loss) per share (in shares)	65,355	63,588	64,892	63,057
Effect of dilutive common stock equivalents (in shares)	3,819	4,319	3,695	4,480
Weighted-average common shares outstanding used to compute diluted net income (loss) per share (in shares)	69,174	67,907	68,587	67,537
Net income per common share:
Basic net income per common share (in dollars per share)	$ 0.21	$ 2.79	$ 0.45	$ 3.47
Diluted net income per common share (in dollars per share)	$ 0.19	$ 2.61	$ 0.42	$ 3.24
Potentially dilutive shares, weighted average (in shares)	1,724	1,224	1,803	908