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CONTRACT ASSETS AND DEFERRED REVENUE - Schedule of Contract Assets and Deferred Revenue (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Contract assets	$ 5,491	$ 5,580
Deferred revenue	$ 81,751	$ 80,471

STOCKHOLDERS’ EQUITY

6 Months Ended

Jun. 30, 2023

Equity [Abstract]

STOCKHOLDERS’ EQUITY

Share-based Compensation Plans

The following table sets forth the detailed allocation of the share-based compensation expense which was included in the Company’s condensed consolidated statements of operations:


	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Cost of revenue	$	439	$	604	$	1,289	$	1,131
Research and development expense	1,731		1,317		3,830		3,853
Selling, general and administrative expense	3,889		3,654		8,364		8,177
Total	$	6,059	$	5,575	$	13,483	$	13,161

Restricted Stock Units:


(in thousands, except per share amounts)	Number of Shares	Weighted Average Grant-Date Fair Value Per Share
Balance at December 31, 2022	3,499	$	8.93
Granted	2,269	13.83
Vested	(1,831)	8.75
Forfeited	(242)	8.90
Balance at June 30, 2023	3,695	$	11.91

The Company’s stock benefit plans include the 2002 Employee Stock Purchase Plan (“ESPP”) and current active stock plans adopted in 1995 and 2002 (“1995 Stock Plan” and “2002 Director Plan”, respectively). Refer to Note 13, “Employee Benefit Plans” of Notes to Consolidated Financial Statements in the 2022 Form 10-K for details pertaining to each plan.

The Company’s stockholders approved an amendment to the ESPP at the 2023 annual meeting of stockholders to increase the number of shares of common stock reserved for issuance under the ESPP by 650,000 shares. As of June 30, 2023, an aggregate of 9,221,697 shares of common stock were reserved for issuance under the 1995 Stock Plan, of which 5,713,754 shares remained available for future grants. As of June 30, 2023, an aggregate of 637,671 shares of common stock were reserved for issuance under the 2002 Director Plan, of which 451,077 shares remained available for future grants.

Share Repurchase Program

In February 2022, the Board of Directors of the Company (“Board”) authorized the Company to repurchase up to $100 million of the Company’s outstanding shares of common stock through February 2025. The Company is authorized to repurchase, from time-to-time, shares of its outstanding common stock through open market purchases and 10b5-1 trading plans, in accordance with applicable rules and regulations, at such time and such prices as management may decide. The program does not obligate the Company to repurchase any specific number of shares and may be discontinued at any time. The actual timing and amount of repurchases are subject to business and market conditions, corporate and regulatory requirements, stock price, acquisition opportunities and other factors.

There were no repurchase activities during the six months ended June 30, 2023. As of June 30, 2023, approximately $94.9 million of the share repurchase authorization remained available for repurchases under this program.

- Definition

The entire disclosure for equity.

+ References

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+ Details

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022
Cash flows from operating activities:
Net income	$ 6,648	$ 13,311
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	6,089	6,128
Stock-based compensation	13,483	13,161
Amortization of convertible debt discount	447	596
Amortization of warrant	870	863
Foreign currency remeasurement	991	(1,680)
Deferred income taxes, net	1,321	1,401
Provision for expected credit losses and returns	1,121	1,648
Provision for excess and obsolete inventories	3,383	3,805
Gain on sale of investment in equity securities	0	(4,370)
Other adjustments	(25)	338
Changes in operating assets and liabilities:
Accounts receivable	(11,513)	(21,386)
Inventories	6,894	(15,429)
Other assets	2,060	(1,367)
Accounts payable	(30,527)	(23,355)
Deferred revenues	1,223	16,393
Other liabilities	(12,717)	4,287
Net cash used in operating activities	(10,252)	(5,656)
Cash flows from investing activities:
Proceeds from sales of investments	0	7,962
Purchases of property and equipment	(3,833)	(5,504)
Net cash provided by (used in) investing activities	(3,833)	2,458
Cash flows from financing activities:
Repurchase of common stock	0	(5,013)
Proceeds from other debts	3,829	3,499
Repayment of other debts	(4,721)	(4,393)
Proceeds from common stock issued to employees	3,084	6,130
Taxes paid related to net share settlement of equity awards	(7,643)	(3,083)
Net cash used in financing activities	(5,451)	(2,860)
Effect of exchange rate changes on cash and cash equivalents	981	(5,554)
Net decrease in cash and cash equivalents	(18,555)	(11,612)
Cash and cash equivalents at beginning of period	89,586	133,431
Cash and cash equivalents at end of period	71,031	121,819
Supplemental schedule of non-cash investing activities:
Capital expenditures incurred but not yet paid	$ 1,189	$ 624

STOCKHOLDERS’ EQUITY - Share-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	$ 6,059	$ 5,575	$ 13,483	$ 13,161
Cost of revenue
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	439	604	1,289	1,131
Research and development expense
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	1,731	1,317	3,830	3,853
Selling, general and administrative expense
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	$ 3,889	$ 3,654	$ 8,364	$ 8,177

CONTRACT ASSETS AND DEFERRED REVENUE - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Revenue from Contract with Customer [Abstract]
Revenue recognized that was included within the deferred revenue balance	$ 14.1	$ 11.3	$ 35.3	$ 34.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 663.8		$ 663.8
Revenue, remaining performance obligation, expected timing of satisfaction, period	12 months		12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period

OTHER FINANCIAL STATEMENT INFORMATION - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 144,162	$ 150,806
Less: accumulated depreciation and amortization	(106,536)	(110,992)
Total	37,626	39,814
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	72,342	75,589
Capitalized software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	27,421	30,588
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	39,495	39,199
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,596	2,739
Construction-in-progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,308	$ 2,691

EARNINGS PER SHARE

6 Months Ended

Jun. 30, 2023

Earnings Per Share [Abstract]

EARNINGS PER SHARE

The following table sets forth the computation of the basic and diluted net income per share:


	Three Months Ended				Six Months Ended
(in thousands, except per share amounts)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Numerator:
Net income	$	1,555	$	14,840	$	6,648	$	13,311
Denominator:
Weighted average number of shares outstanding:
Basic	111,462		104,630		111,130		104,312
2022 Notes	—		2,365		—		2,537
2024 Notes	6,144		491		5,554		1,014
Stock options	—		234		—		249
Restricted stock units	1,573		1,193		1,786		1,627
Stock purchase rights under the ESPP	76		71		38		35
Diluted	119,255		108,984		118,508		109,774
Net income per share:
Basic	$	0.01	$	0.14	$	0.06	$	0.13
Diluted	$	0.01	$	0.14	$	0.06	$	0.12

The following table sets forth the potential dilutive shares that were excluded from the computation of diluted net income per share, because their effects were anti-dilutive:


	Three Months Ended		Six Months Ended
(in thousands)	June 30, 2023	July 1, 2022	June 30, 2023	July 1, 2022


Restricted stock units	37	48	55	53
Stock purchase rights under the ESPP	—	398	150	404
Total	37	446	205	457

CONTRACT ASSETS AND DEFERRED REVENUE (Tables)

6 Months Ended

Jun. 30, 2023

Revenue from Contract with Customer [Abstract]

Schedule of Contract Assets and Deferred Revenue

Contract assets and deferred revenue consisted of the following:


	As of
(in thousands)	June 30, 2023		December 31, 2022
Contract assets	$	5,491	$	5,580
Deferred revenue	$	81,751	$	80,471

LEASES

6 Months Ended

Jun. 30, 2023

Leases [Abstract]

LEASES

The components of lease expense are as follows:


	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Operating lease cost	$	1,761	$	2,148	$	3,525	$	4,035
Variable lease cost	425		431		850		892
Total lease cost	$	2,186	$	2,579	$	4,375	$	4,927

Supplemental information related to leases are as follows:


	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Cash paid for amounts included in the measurement of operating lease liabilities	$	1,778	$	1,962	$	3,606	$	3,878
Right-of-use assets obtained in exchange for operating lease obligations	$	—	$	77	$	—	$	206

SEGMENT INFORMATION - Schedule of Financial Information by Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Segment Reporting Information [Line Items]
Revenue	$ 155,963	$ 157,446	$ 313,612	$ 304,885
Gross profit	84,940	82,401	168,994	151,583
Operating income (loss)	9,962	15,082	21,142	17,618
Operating Segments
Segment Reporting Information [Line Items]
Revenue	155,963	157,446	313,612	304,885
Gross profit	85,379	83,072	170,283	152,767
Operating income (loss)	18,156	21,402	36,843	32,680
Operating Segments \| Video
Segment Reporting Information [Line Items]
Revenue	58,867	76,215	116,165	142,057
Gross profit	36,303	48,136	70,917	86,820
Operating income (loss)	90	11,271	(1,336)	14,410
Operating Segments \| Broadband
Segment Reporting Information [Line Items]
Revenue	97,096	81,231	197,447	162,828
Gross profit	49,076	34,936	99,366	65,947
Operating income (loss)	$ 18,066	$ 10,131	$ 38,179	$ 18,270

- Definition

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

+ References

+ Details

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

EARNINGS PER SHARE - Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Numerator:
Net income	$ 1,555	$ 14,840	$ 6,648	$ 13,311
Denominator:
Basic (in shares)	111,462	104,630	111,130	104,312
Diluted (in shares)	119,255	108,984	118,508	109,774
Net income per share:
Basic (in dollars per share)	$ 0.01	$ 0.14	$ 0.06	$ 0.13
Diluted (in dollars per share)	$ 0.01	$ 0.14	$ 0.06	$ 0.12
Stock options
Denominator:
Weighted average number diluted shares outstanding adjustment (in shares)	0	234	0	249
Restricted stock units
Denominator:
Weighted average number diluted shares outstanding adjustment (in shares)	1,573	1,193	1,786	1,627
Stock purchase rights under the ESPP
Denominator:
Weighted average number diluted shares outstanding adjustment (in shares)	76	71	38	35
2022 Notes
Denominator:
Weighted average number diluted shares outstanding adjustment (in shares)	0	2,365	0	2,537
2024 Notes
Denominator:
Weighted average number diluted shares outstanding adjustment (in shares)	6,144	491	5,554	1,014

CONTRACT ASSETS AND DEFERRED REVENUE

6 Months Ended

Jun. 30, 2023

Revenue from Contract with Customer [Abstract]

CONTRACT ASSETS AND DEFERRED REVENUE

Contract assets exist when the Company has satisfied a performance obligation but does not have an unconditional right to consideration (e.g., because the entity first must satisfy another performance obligation in the contract before it is entitled to invoice the customer). Deferred revenue represents the Company’s obligation to transfer goods or services to a customer for which the Company has received consideration (or an amount of consideration is due) from the customer.

Contract assets and deferred revenue consisted of the following:


	As of
(in thousands)	June 30, 2023		December 31, 2022
Contract assets	$	5,491	$	5,580
Deferred revenue	$	81,751	$	80,471

Contract assets and the non-current portion of deferred revenue are reported as components of “Prepaid expenses and other current assets” and “Other non-current liabilities,” respectively, on the condensed consolidated balance sheets.

Revenue recognized during the three months ended June 30, 2023 and July 1, 2022, that was included within the deferred revenue balance at January 1, 2023 and 2022 was $14.1 million and $11.3 million, respectively. Revenue recognized during the six months ended June 30, 2023 and July 1, 2022, that was included within the deferred revenue balance at January 1, 2023 and 2022 was $35.3 million and $34.8 million, respectively.

Remaining performance obligations represent contracted revenues that have not yet been recognized and include deferred revenue and unbilled amounts that will be recognized as revenue in the future. The aggregate balance of the Company’s remaining performance obligations as of June 30, 2023 was $663.8 million, a majority of which is expected to be recognized as revenue over the next 12 months and the remainder thereafter.

Refer to Note 10, “Segment Information” for disaggregated revenue information.

- Definition

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

+ References

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+ Details

SEGMENT INFORMATION (Tables)

6 Months Ended

Jun. 30, 2023

Segment Reporting [Abstract]

Schedule of Financial Information by Reportable Segments

The following table provides summary financial information by reportable segment:


	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Video
Revenue	$	58,867	$	76,215	$	116,165	$	142,057
Gross profit	36,303		48,136		70,917		86,820
Operating income (loss)	90		11,271		(1,336)		14,410
Broadband
Revenue	$	97,096	$	81,231	$	197,447	$	162,828
Gross profit	49,076		34,936		99,366		65,947
Operating income	18,066		10,131		38,179		18,270
Total
Revenue	$	155,963	$	157,446	$	313,612	$	304,885
Gross profit	85,379		83,072		170,283		152,767
Operating income	18,156		21,402		36,843		32,680

Schedule of Reconciliation of Operating Income from Segments to Consolidated

A reconciliation of the Company’s consolidated segment operating income to consolidated income before income taxes is as follows:


	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Total consolidated segment operating income	$	18,156	$	21,402	$	36,843	$	32,680
Unallocated corporate expenses(1)	(2,135)		(745)		(2,218)		(1,901)
Stock-based compensation	(6,059)		(5,575)		(13,483)		(13,161)
Consolidated income from operations	9,962		15,082		21,142		17,618
Non-operating expense, net	(936)		2,880		(1,935)		1,509
Income before income taxes	$	9,026	$	17,962	$	19,207	$	19,127

(1) Together with stock-based compensation, the Company does not allocate restructuring and related charges and other non-recurring expenses to the operating income (loss) for each segment because management does not include this information in the measurement of the performance of the operating segments.

Schedule of Net Revenue by Geographic Region


Geographic Information	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Net revenue (1)
United States	$	101,908	$	106,109	$	207,649	$	192,987
Other countries	54,055		51,337		105,963		111,898
Total	$	155,963	$	157,446	$	313,612	$	304,885

(1) Revenue is attributed to countries based on the location of the customer.

BASIS OF PRESENTATION	6 Months Ended
BASIS OF PRESENTATION	Jun. 30, 2023
Accounting Policies [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States ("U.S. GAAP") and applicable rules and regulations of the Securities and Exchange Commission regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. As such, the information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes included in our Annual Report on Form 10-K for the year ended December 31, 2022 (“2022 Form 10-K”). The accompanying unaudited condensed consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation of the Company's financial position as of balance sheet dates and its operating results and cash flows for the interim periods presented. Operating results for interim periods are not necessarily indicative of the results that may be expected for any subsequent quarter or for the fiscal year ending December 31, 2023. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. The Company’s significant accounting policies are described in Note 2 to its audited Consolidated Financial Statements included in the 2022 Form 10-K. There have been no significant changes to these policies during the six months ended June 30, 2023.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning balance (in shares) at Dec. 31, 2021				102,959,000	102,959,000
Beginning balance at Dec. 31, 2021	$ 295,913	$ (13,910)	$ 282,003	$ 103	$ 103	$ 2,387,039	$ (32,249)	$ 2,354,790	$ (2,087,957)	$ 18,339	$ (2,069,618)	$ (3,272)	$ (3,272)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	13,311								13,311
Other comprehensive income (loss), net of tax	(9,678)											(9,678)
Issuance of common stock under stock option, award and purchase plans, net (in shares)				2,659,000
Issuance of common stock under award and purchase plans, net	3,047			$ 2		3,045
Repurchase of common stock (in shares)				(557,000)
Repurchase of common stock	(5,013)								(5,013)
Stock-based compensation	13,166					13,166
Ending balance (in shares) at Jul. 01, 2022				105,061,000
Ending balance at Jul. 01, 2022	296,836			$ 105		2,371,001			(2,061,320)			(12,950)
Beginning balance (in shares) at Apr. 01, 2022				104,603,000
Beginning balance at Apr. 01, 2022	284,653			$ 105		2,362,873			(2,073,288)			(5,037)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,840								14,840
Other comprehensive income (loss), net of tax	(7,913)											(7,913)
Issuance of common stock under stock option, award and purchase plans, net (in shares)				782,000
Issuance of common stock under award and purchase plans, net	2,773					2,773
Repurchase of common stock (in shares)				(324,000)
Repurchase of common stock	(2,872)								(2,872)
Stock-based compensation	5,355					5,355
Ending balance (in shares) at Jul. 01, 2022				105,061,000
Ending balance at Jul. 01, 2022	$ 296,836			$ 105		2,371,001			(2,061,320)			(12,950)
Beginning balance (in shares) at Dec. 31, 2022	109,871,000			109,871,000
Beginning balance at Dec. 31, 2022	$ 324,506			$ 110		2,380,651			(2,046,569)			(9,686)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,648								6,648
Other comprehensive income (loss), net of tax	2,723											2,723
Issuance of common stock under stock option, award and purchase plans, net (in shares)				1,713,000
Issuance of common stock under award and purchase plans, net	$ (4,559)			$ 2		(4,561)
Repurchase of common stock (in shares)	0
Stock-based compensation	$ 13,483					13,483
Ending balance (in shares) at Jun. 30, 2023	111,584,000			111,584,000
Ending balance at Jun. 30, 2023	$ 342,801			$ 112		2,389,573			(2,039,921)			(6,963)
Beginning balance (in shares) at Mar. 31, 2023				111,332,000
Beginning balance at Mar. 31, 2023	335,786			$ 111		2,384,806			(2,041,476)			(7,655)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,555								1,555
Other comprehensive income (loss), net of tax	692											692
Issuance of common stock under stock option, award and purchase plans, net (in shares)				252,000
Issuance of common stock under award and purchase plans, net	(1,291)			$ 1		(1,292)
Stock-based compensation	$ 6,059					6,059
Ending balance (in shares) at Jun. 30, 2023	111,584,000			111,584,000
Ending balance at Jun. 30, 2023	$ 342,801			$ 112		$ 2,389,573			$ (2,039,921)			$ (6,963)

SEGMENT INFORMATION - Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Segment Reporting Information [Line Items]
Net revenue	$ 155,963	$ 157,446	$ 313,612	$ 304,885
United States
Segment Reporting Information [Line Items]
Net revenue	101,908	106,109	207,649	192,987
Other countries
Segment Reporting Information [Line Items]
Net revenue	$ 54,055	$ 51,337	$ 105,963	$ 111,898

- Definition

+ References

+ Details

COMMITMENTS AND CONTINGENCIES	6 Months Ended
COMMITMENTS AND CONTINGENCIES	Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Legal proceedings From time to time, the Company is involved in lawsuits as well as subject to various legal proceedings, claims, threats of litigation, and investigations in the ordinary course of business, including claims of alleged infringement of third-party patents and other intellectual property rights, commercial, employment, and other matters. The Company assesses potential liabilities in connection with each lawsuit and threatened lawsuits and accrues an estimated loss for these loss contingencies if both of the following conditions are met: information available prior to issuance of the financial statements indicates that it is probable that a liability has been incurred at the date of the financial statements and the amount of loss can be reasonably estimated. While certain matters to which the Company is a party specify the damages claimed, such claims may not represent reasonably probable losses. Given the inherent uncertainties of litigation, the ultimate outcome of these matters cannot be predicted at this time, nor can the amount of possible loss or range of loss, if any, be reasonably estimated.

CONVERTIBLE DEBT - Components of Convertible Notes (Details) - 2024 Notes - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Principal amount	$ 115,500	$ 115,500
Less: Debt issuance costs, net of amortization	(1,072)	(1,519)
Carrying amount	$ 114,428	$ 113,981

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

LEASES (Tables)

6 Months Ended

Jun. 30, 2023

Leases [Abstract]

Schedule of Lease Expense

The components of lease expense are as follows:


	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Operating lease cost	$	1,761	$	2,148	$	3,525	$	4,035
Variable lease cost	425		431		850		892
Total lease cost	$	2,186	$	2,579	$	4,375	$	4,927

Supplemental information related to leases are as follows:


	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Cash paid for amounts included in the measurement of operating lease liabilities	$	1,778	$	1,962	$	3,606	$	3,878
Right-of-use assets obtained in exchange for operating lease obligations	$	—	$	77	$	—	$	206

OTHER FINANCIAL STATEMENT INFORMATION

6 Months Ended

Jun. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

OTHER FINANCIAL STATEMENT INFORMATION

The following tables provide details of selected balance sheet components:


Accounts receivable, net:	As of
(in thousands)	June 30, 2023		December 31, 2022
Accounts receivable	$	121,605	$	110,576
Less: allowances for expected credit losses and sales returns	(2,402)		(2,149)
Total	$	119,203	$	108,427


Inventories:	As of
(in thousands)	June 30, 2023		December 31, 2022
Finished goods	$	60,843	$	65,308
Raw materials	43,367		46,081
Work-in-process	3,856		3,251
Service-related spares	5,521		6,309
Total	$	113,587	$	120,949


Prepaid expenses and other current assets:	As of
(in thousands)	June 30, 2023		December 31, 2022
Prepaid expenses	$	4,233	$	5,558
Contract assets	5,491		5,583
Other current assets	17,971		15,196
Total	$	27,695	$	26,337


Property and equipment, net:	As of
(in thousands)	June 30, 2023		December 31, 2022
Machinery and equipment	$	72,342	$	75,589
Capitalized software	27,421		30,588
Leasehold improvements	39,495		39,199
Furniture and fixtures	2,596		2,739
Construction-in-progress	2,308		2,691
Property and equipment, gross	144,162		150,806
Less: accumulated depreciation and amortization	(106,536)		(110,992)
Total	$	37,626	$	39,814


Other current liabilities:	As of
(in thousands)	June 30, 2023		December 31, 2022
Accrued employee compensation and related expenses	$	24,271	$	29,675
Other	34,189		37,049
Total	$	58,460	$	66,724

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Total net revenue	$ 155,963	$ 157,446	$ 313,612	$ 304,885
Total cost of revenue	71,023	75,045	144,618	153,302
Total gross profit	84,940	82,401	168,994	151,583
Operating expenses:
Research and development	32,205	29,920	65,714	58,753
Selling, general and administrative	42,773	36,768	82,055	73,411
Restructuring and related charges	0	631	83	1,801
Total operating expenses	74,978	67,319	147,852	133,965
Income from operations	9,962	15,082	21,142	17,618
Interest expense, net	(800)	(1,394)	(1,506)	(2,827)
Other income (expense), net	(136)	4,274	(429)	4,336
Income before income taxes	9,026	17,962	19,207	19,127
Provision for income taxes	7,471	3,122	12,559	5,816
Net income	$ 1,555	$ 14,840	$ 6,648	$ 13,311
Net income per share:
Basic (in dollars per share)	$ 0.01	$ 0.14	$ 0.06	$ 0.13
Diluted (in dollars per share)	$ 0.01	$ 0.14	$ 0.06	$ 0.12
Weighted average shares outstanding:
Basic (in shares)	111,462	104,630	111,130	104,312
Diluted (in shares)	119,255	108,984	118,508	109,774
Appliance and integration
Total net revenue	$ 111,127	$ 121,868	$ 225,921	$ 234,852
Total cost of revenue	57,437	62,341	117,185	128,723
SaaS and service
Total net revenue	44,836	35,578	87,691	70,033
Total cost of revenue	$ 13,586	$ 12,704	$ 27,433	$ 24,579

CONVERTIBLE DEBT - Interest Expense (Details) - 2024 Notes - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Debt Instrument [Line Items]
Contractual interest expense	$ 578	$ 578	$ 1,156	$ 1,156
Amortization of debt issuance costs	224	217	447	434
Total interest expense recognized	$ 802	$ 795	$ 1,603	$ 1,590

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

OTHER FINANCIAL STATEMENT INFORMATION (Tables)

6 Months Ended

Jun. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Accounts Receivable, Net

The following tables provide details of selected balance sheet components:


Accounts receivable, net:	As of
(in thousands)	June 30, 2023		December 31, 2022
Accounts receivable	$	121,605	$	110,576
Less: allowances for expected credit losses and sales returns	(2,402)		(2,149)
Total	$	119,203	$	108,427

Schedule of Inventories


Inventories:	As of
(in thousands)	June 30, 2023		December 31, 2022
Finished goods	$	60,843	$	65,308
Raw materials	43,367		46,081
Work-in-process	3,856		3,251
Service-related spares	5,521		6,309
Total	$	113,587	$	120,949

Schedule of Prepaid Expenses and Other Current Assets


Prepaid expenses and other current assets:	As of
(in thousands)	June 30, 2023		December 31, 2022
Prepaid expenses	$	4,233	$	5,558
Contract assets	5,491		5,583
Other current assets	17,971		15,196
Total	$	27,695	$	26,337

Schedule of Property and Equipment, Net


Property and equipment, net:	As of
(in thousands)	June 30, 2023		December 31, 2022
Machinery and equipment	$	72,342	$	75,589
Capitalized software	27,421		30,588
Leasehold improvements	39,495		39,199
Furniture and fixtures	2,596		2,739
Construction-in-progress	2,308		2,691
Property and equipment, gross	144,162		150,806
Less: accumulated depreciation and amortization	(106,536)		(110,992)
Total	$	37,626	$	39,814

Schedule of Other Current Liabilities


Other current liabilities:	As of
(in thousands)	June 30, 2023		December 31, 2022
Accrued employee compensation and related expenses	$	24,271	$	29,675
Other	34,189		37,049
Total	$	58,460	$	66,724

EARNINGS PER SHARE - Antidilutive Securities (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential weighted common shares outstanding excluded from diluted net loss per share (in shares)	37	446	205	457
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential weighted common shares outstanding excluded from diluted net loss per share (in shares)	37	48	55	53
Stock purchase rights under the ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential weighted common shares outstanding excluded from diluted net loss per share (in shares)	0	398	150	404

OTHER FINANCIAL STATEMENT INFORMATION - Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued employee compensation and related expenses	$ 24,271	$ 29,675
Other	34,189	37,049
Total	$ 58,460	$ 66,724

CONVERTIBLE DEBT - Narrative (Details) $ / shares in Units, $ in Thousands		6 Months Ended
	Sep. 13, 2019 USD ($) $ / shares	Jun. 30, 2023 USD ($) day	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Convertible debt, current		$ 114,428	$ 113,981
2024 Notes
Debt Instrument [Line Items]
Debt instrument principal amount		115,500	$ 115,500
2024 Notes \| Senior Notes
Debt Instrument [Line Items]
Debt instrument stated percentage (as a percent)	2.00%
Debt instrument principal amount	$ 115,500
Debt instrument conversion ratio	0.1155001
Debt instrument conversion price (in dollars per share) \| $ / shares	$ 8.66
Convertible debt, current		$ 114,400
2024 Notes \| Senior Notes \| Stock Price Greater or Equal 130 Percent of Note Conversion Rate
Debt Instrument [Line Items]
Debt instrument threshold trading days \| day		20
Debt instrument threshold consecutive trading days \| day		30
Debt instrument threshold percentage of stock price trigger (as a percent)		130.00%

INVESTMENTS IN EQUITY SECURITIES (Details) - EDC $ in Millions	1 Months Ended
	May 31, 2022 USD ($)
Equity Securities without Readily Determinable Fair Value [Line Items]
Total consideration	$ 10.7
Proceeds from sales of investments	7.8
Gain on sale of investment	4.2
Potential additional consideration on sale of equity securities	$ 2.9
Expiration period	18 months

FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Jun. 30, 2023

Fair Value Disclosures [Abstract]

Schedule of Financial Instruments Not Measured at Fair Value on a Recurring Basis

The Company’s financial instruments not measured at fair value on a recurring basis were as follows:


	June 30, 2023								December 31, 2022
	Carrying		Fair Value						Carrying		Fair Value
(in thousands)	Value		Level 1		Level 2		Level 3		Value		Level 1		Level 2		Level 3

2024 Notes	$	114,428	$	—	$	218,586	$	—	$	113,981	$	—	$	181,139	$	—

OTHER FINANCIAL STATEMENT INFORMATION - Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts receivable	$ 121,605	$ 110,576
Less: allowances for expected credit losses and sales returns	(2,402)	(2,149)
Total	$ 119,203	$ 108,427

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 71,031	$ 89,586
Accounts receivable, net	119,203	108,427
Inventories	113,587	120,949
Prepaid expenses and other current assets	27,695	26,337
Total current assets	331,516	345,299
Property and equipment, net	37,626	39,814
Operating lease right-of-use assets	23,138	25,469
Goodwill	238,709	237,739
Other non-current assets	59,363	61,697
Total assets	690,352	710,018
Current liabilities:
Convertible debt, current	114,428	113,981
Other debts, current	4,851	4,756
Accounts payable	37,108	67,455
Deferred revenue	66,218	62,383
Operating lease liabilities, current	6,624	6,773
Other current liabilities	58,460	66,724
Total current liabilities	287,689	322,072
Other debts, non-current	10,539	11,161
Operating lease liabilities, non-current	21,557	24,110
Other non-current liabilities	27,766	28,169
Total liabilities	347,551	385,512
Commitments and contingencies (Note 11)
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.001 par value, 150,000 shares authorized; 111,584 and 109,871 shares issued and outstanding at June 30, 2023 and December 31, 2022, respectively	112	110
Additional paid-in capital	2,389,573	2,380,651
Accumulated deficit	(2,039,921)	(2,046,569)
Accumulated other comprehensive loss	(6,963)	(9,686)
Total stockholders’ equity	342,801	324,506
Total liabilities and stockholders’ equity	$ 690,352	$ 710,018

CONVERTIBLE DEBT

6 Months Ended

Jun. 30, 2023

Debt Disclosure [Abstract]

CONVERTIBLE DEBT

2.00% Convertible Senior Notes due 2024 (the “2024 Notes”)

In September 2019, the Company issued $115.5 million of the 2024 Notes pursuant to an indenture (the “2024 Notes Indenture”), dated September 13, 2019, by and between the Company and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association), as trustee. The 2024 Notes bear interest at a rate of 2.00% per year, payable semi-annually on March 1 and September 1 of each year, beginning March 1, 2020. The 2024 Notes will mature on September 1, 2024, unless earlier repurchased by the Company, redeemed by the Company or converted pursuant to their terms.

The 2024 Notes were initially convertible into cash, shares of the Company’s common stock, or a combination thereof, at the Company’s election, at an initial conversion rate of 115.5001 shares of the Company’s common stock per $1,000 principal amount of the 2024 Notes (which is equivalent to an initial conversion price of approximately $8.66 per share). Pursuant to the supplemental indenture entered into by the Company and the trustee during the fourth quarter of the fiscal year ended December 31, 2021, the Company made an irrevocable election to settle the principal amounts of the 2024 Notes solely with cash and may pay or deliver, as the case may be, any conversion value greater than the principal amount in cash, shares of the Company’s common stock or a combination thereof, at the Company’s election. The conversion rate, and thus the effective conversion price, may be adjusted under certain circumstances, including in connection with conversions made following certain fundamental changes or a notice of redemption and under other circumstances, in each case, as set forth in the 2024 Notes Indenture.

The 2024 Notes will be convertible at certain times and upon the occurrence of certain events in the future, in each case, specified in the 2024 Notes Indenture. Further, on or after June 1, 2024, until the close of business on the scheduled trading day immediately preceding the maturity date, holders of the 2024 Notes may convert all or a portion of their 2024 Notes regardless of these conditions.

The 2024 Notes remained convertible as of June 30, 2023, as the last reported sale price of the Company’s common stock for at least 20 trading days during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding fiscal quarter was greater than or equal to 130% of the conversion price of the 2024 Notes on each applicable trading day. All $114.4 million of the net carrying amount of the 2024 Notes outstanding as of June 30, 2023 was classified as a current liability as of that date.

The following table presents the components of the 2024 Notes:


	As of
(in thousands, except for years and percentages)	June 30, 2023		December 31, 2022
Liability:
Principal amount	$	115,500	$	115,500

Less: Debt issuance costs, net of amortization	(1,072)		(1,519)
Carrying amount	$	114,428	$	113,981

The following table presents interest expense recognized for the 2024 Notes:


	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Contractual interest expense	$	578	$	578	$	1,156	$	1,156

Amortization of debt issuance costs	224		217		447		434
Total interest expense recognized	$	802	$	795	$	1,603	$	1,590

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

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+ Details

SEGMENT INFORMATION - Segment Income or Loss Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Segment Reporting Information [Line Items]
Total consolidated segment operating income	$ 9,962	$ 15,082	$ 21,142	$ 17,618
Unallocated corporate expenses	(74,978)	(67,319)	(147,852)	(133,965)
Stock-based compensation	(6,059)	(5,575)	(13,483)	(13,161)
Non-operating expense, net	(936)	2,880	(1,935)	1,509
Income before income taxes	9,026	17,962	19,207	19,127
Operating Segments
Segment Reporting Information [Line Items]
Total consolidated segment operating income	18,156	21,402	36,843	32,680
Corporate, Non-segments
Segment Reporting Information [Line Items]
Unallocated corporate expenses	$ (2,135)	$ (745)	$ (2,218)	$ (1,901)

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Jun. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

FAIR VALUE MEASUREMENTS (Details) - 2024 Notes - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	$ 114,428	$ 113,981
Fair Value, Nonrecurring \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Fair Value, Nonrecurring \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	218,586	181,139
Fair Value, Nonrecurring \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 0	$ 0

EARNINGS PER SHARE (Tables)

6 Months Ended

Jun. 30, 2023

Earnings Per Share [Abstract]

Schedule of Numerators and Denominators of Basic and Diluted Net Income Per Share Computations

The following table sets forth the computation of the basic and diluted net income per share:


	Three Months Ended				Six Months Ended
(in thousands, except per share amounts)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Numerator:
Net income	$	1,555	$	14,840	$	6,648	$	13,311
Denominator:
Weighted average number of shares outstanding:
Basic	111,462		104,630		111,130		104,312
2022 Notes	—		2,365		—		2,537
2024 Notes	6,144		491		5,554		1,014
Stock options	—		234		—		249
Restricted stock units	1,573		1,193		1,786		1,627
Stock purchase rights under the ESPP	76		71		38		35
Diluted	119,255		108,984		118,508		109,774
Net income per share:
Basic	$	0.01	$	0.14	$	0.06	$	0.13
Diluted	$	0.01	$	0.14	$	0.06	$	0.12

Schedule of Antidilutive Securities

The following table sets forth the potential dilutive shares that were excluded from the computation of diluted net income per share, because their effects were anti-dilutive:


	Three Months Ended		Six Months Ended
(in thousands)	June 30, 2023	July 1, 2022	June 30, 2023	July 1, 2022


Restricted stock units	37	48	55	53
Stock purchase rights under the ESPP	—	398	150	404
Total	37	446	205	457

STOCKHOLDERS’ EQUITY - Restricted Stock Units Outstanding (Details) - Restricted stock units shares in Thousands	6 Months Ended
	Jun. 30, 2023 $ / shares shares
Number of Shares
Beginning balance (in shares) \| shares	3,499
Granted (in shares) \| shares	2,269
Vested (in shares) \| shares	(1,831)
Forfeited (in shares) \| shares	(242)
Ending balance (in shares) \| shares	3,695
Weighted Average Grant-Date Fair Value Per Share
Beginning balance (in dollars per share) \| $ / shares	$ 8.93
Granted (in dollars per share) \| $ / shares	13.83
Vested (in dollars per share) \| $ / shares	8.75
Forfeited (in dollars per share) \| $ / shares	8.90
Ending balance (in dollars per share) \| $ / shares	$ 11.91

FAIR VALUE MEASUREMENTS

6 Months Ended

Jun. 30, 2023

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

The Company’s financial instruments not measured at fair value on a recurring basis were as follows:


	June 30, 2023								December 31, 2022
	Carrying		Fair Value						Carrying		Fair Value
(in thousands)	Value		Level 1		Level 2		Level 3		Value		Level 1		Level 2		Level 3

2024 Notes	$	114,428	$	—	$	218,586	$	—	$	113,981	$	—	$	181,139	$	—

The fair value of the Company’s convertible notes is influenced by interest rates, the price of the Company’s common stock and stock market volatility. The difference between the carrying value and the fair value is primarily due to the spread between the conversion price and the market value of the shares underlying the conversion as of each respective balance sheet date.

- Definition

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

+ References + Details

STOCKHOLDERS’ EQUITY - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Feb. 28, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount		$ 100.0
Stock repurchased and retired during period (in shares)	0
Remaining stock repurchase authorization amount	$ 94.9
Stock Plan 1995
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	9,221,697
Shares available for grant (in shares)	5,713,754
Director Option Plans 2002
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	637,671
Shares available for grant (in shares)	451,077
Stock purchase rights under the ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance under the ESPP (in shares)	650,000

OTHER FINANCIAL STATEMENT INFORMATION - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaid expenses	$ 4,233	$ 5,558
Contract assets	5,491	5,583
Other current assets	17,971	15,196
Total	$ 27,695	$ 26,337

INVESTMENTS IN EQUITY SECURITIES	6 Months Ended
INVESTMENTS IN EQUITY SECURITIES	Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]
INVESTMENTS IN EQUITY SECURITIES	INVESTMENTS IN EQUITY SECURITIES In May 2022, the Company sold its investment in Encoding.com, Inc. for total consideration of up to approximately $10.7 million. The Company received $7.8 million in May 2022 and recognized a gain of $4.2 million. The balance of the consideration of up to approximately $2.9 million will be payable to the Company within 18 months from the date of sale, subject to certain conditions and indemnity obligations, and will be recorded upon receipt by the Company.

BASIS OF PRESENTATION (Policies)	6 Months Ended
BASIS OF PRESENTATION (Policies)	Jun. 30, 2023
Accounting Policies [Abstract]
Use of Estimates	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
Segment Information	Operating segments are defined as components of an enterprise that engage in business activities for which separate financial information is available and evaluated regularly by the Company’s Chief Operating Decision Maker (the “CODM”), which for the Company is its Chief Executive Officer, in deciding how to allocate resources and assess performance. Based on the internal reporting structure, the Company consists of two operating segments: Video and Broadband. The operating segments were determined based on the nature of the products offered. The Video segment provides video processing, production and playout solutions and services worldwide to broadcast and media companies, new streaming media companies, broadband operators, and satellite and telecommunications (“telco”) Pay-TV service providers. The Broadband segment provides broadband access solutions and related services to broadband operators globally. A measure of assets by segment is not applicable as segment assets are not included in the discrete financial information provided to the CODM.

- Definition

Disclosure of accounting policy for segment reporting.

+ References + Details

OTHER FINANCIAL STATEMENT INFORMATION - Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Finished goods	$ 60,843	$ 65,308
Raw materials	43,367	46,081
Work-in-process	3,856	3,251
Service-related spares	5,521	6,309
Total	$ 113,587	$ 120,949

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Pay vs Performance Disclosure
Net income	$ 1,555	$ 14,840	$ 6,648	$ 13,311

- Definition

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

+ References

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+ Details

STOCKHOLDERS’ EQUITY (Tables)

6 Months Ended

Jun. 30, 2023

Equity [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The following table sets forth the detailed allocation of the share-based compensation expense which was included in the Company’s condensed consolidated statements of operations:


	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Cost of revenue	$	439	$	604	$	1,289	$	1,131
Research and development expense	1,731		1,317		3,830		3,853
Selling, general and administrative expense	3,889		3,654		8,364		8,177
Total	$	6,059	$	5,575	$	13,483	$	13,161

Schedule of Restricted Stock Units Outstanding


(in thousands, except per share amounts)	Number of Shares	Weighted Average Grant-Date Fair Value Per Share
Balance at December 31, 2022	3,499	$	8.93
Granted	2,269	13.83
Vested	(1,831)	8.75
Forfeited	(242)	8.90
Balance at June 30, 2023	3,695	$	11.91

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 1,555	$ 14,840	$ 6,648	$ 13,311
Other comprehensive income (loss) before tax:
Change in foreign currency translation adjustments	667	(7,608)	2,626	(9,310)
Other comprehensive income (loss) before tax	667	(7,608)	2,626	(9,310)
Provision for (benefit from) income taxes	(25)	305	(97)	368
Other comprehensive income (loss), net of tax	692	(7,913)	2,723	(9,678)
Total comprehensive income	$ 2,247	$ 6,927	$ 9,371	$ 3,633

- Definition

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

+ References

+ Details

Label	Element	Value
Accounting Standards Update [Extensible Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2020-06 [Member]

- Definition

Indicates amendment to accounting standards.

+ References

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+ Details

CONVERTIBLE DEBT (Tables)

6 Months Ended

Jun. 30, 2023

Debt Disclosure [Abstract]

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments

The following table presents the components of the 2024 Notes:


	As of
(in thousands, except for years and percentages)	June 30, 2023		December 31, 2022
Liability:
Principal amount	$	115,500	$	115,500

Less: Debt issuance costs, net of amortization	(1,072)		(1,519)
Carrying amount	$	114,428	$	113,981

Schedule of Convertible Debt Interest

The following table presents interest expense recognized for the 2024 Notes:


	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Contractual interest expense	$	578	$	578	$	1,156	$	1,156

Amortization of debt issuance costs	224		217		447		434
Total interest expense recognized	$	802	$	795	$	1,603	$	1,590

Cover - shares	6 Months Ended
Cover - shares	Jun. 30, 2023	Jul. 31, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
Document Transition Report	false
Entity File Number	000-25826
Entity Registrant Name	HARMONIC INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0201147
Entity Address, Address Line One	2590 Orchard Parkway
Entity Address, City or Town	San Jose
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95131
City Area Code	408
Local Phone Number	542-2500
Title of 12(b) Security	Common stock, $0.001 par value
Trading Symbol	HLIT
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		111,914,979
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Entity Central Index Key	0000851310
Current Fiscal Year End Date	--12-31

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
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)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	111,584,000	109,871,000
Common stock, shares outstanding (in shares)	111,584,000	109,871,000

LEASES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
LEASES (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Leases [Abstract]
Operating lease cost	$ 1,761	$ 2,148	$ 3,525	$ 4,035
Variable lease cost	425	431	850	892
Total lease cost	2,186	2,579	4,375	4,927
Supplemental information related to leases are as follows:
Cash paid for amounts included in the measurement of operating lease liabilities	1,778	1,962	3,606	3,878
Right-of-use assets obtained in exchange for operating lease obligations	$ 0	$ 77	$ 0	$ 206

SEGMENT INFORMATION - Narrative (Details)	6 Months Ended
SEGMENT INFORMATION - Narrative (Details)	Jun. 30, 2023 segment
Segment Reporting [Abstract]
Number of operating segments	2

SEGMENT INFORMATION

6 Months Ended

Jun. 30, 2023

Segment Reporting [Abstract]

SEGMENT INFORMATION

SEGMENT INFORMATIONOperating segments are defined as components of an enterprise that engage in business activities for which separate financial information is available and evaluated regularly by the Company’s Chief Operating Decision Maker (the “CODM”), which for the Company is its Chief Executive Officer, in deciding how to allocate resources and assess performance. Based on the internal reporting structure, the Company consists of two operating segments: Video and Broadband. The operating segments were determined based on the nature of the products offered. The Video segment provides video processing, production and playout solutions and services worldwide to broadcast and media companies, new streaming media companies, broadband operators, and satellite and telecommunications (“telco”) Pay-TV service providers. The Broadband segment provides broadband access solutions and related services to broadband operators globally. A measure of assets by segment is not applicable as segment assets are not included in the discrete financial information provided to the CODM.

The following table provides summary financial information by reportable segment:


	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Video
Revenue	$	58,867	$	76,215	$	116,165	$	142,057
Gross profit	36,303		48,136		70,917		86,820
Operating income (loss)	90		11,271		(1,336)		14,410
Broadband
Revenue	$	97,096	$	81,231	$	197,447	$	162,828
Gross profit	49,076		34,936		99,366		65,947
Operating income	18,066		10,131		38,179		18,270
Total
Revenue	$	155,963	$	157,446	$	313,612	$	304,885
Gross profit	85,379		83,072		170,283		152,767
Operating income	18,156		21,402		36,843		32,680

A reconciliation of the Company’s consolidated segment operating income to consolidated income before income taxes is as follows:


	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Total consolidated segment operating income	$	18,156	$	21,402	$	36,843	$	32,680
Unallocated corporate expenses(1)	(2,135)		(745)		(2,218)		(1,901)
Stock-based compensation	(6,059)		(5,575)		(13,483)		(13,161)
Consolidated income from operations	9,962		15,082		21,142		17,618
Non-operating expense, net	(936)		2,880		(1,935)		1,509
Income before income taxes	$	9,026	$	17,962	$	19,207	$	19,127


Geographic Information	Three Months Ended				Six Months Ended
(in thousands)	June 30, 2023		July 1, 2022		June 30, 2023		July 1, 2022
Net revenue (1)
United States	$	101,908	$	106,109	$	207,649	$	192,987
Other countries	54,055		51,337		105,963		111,898
Total	$	155,963	$	157,446	$	313,612	$	304,885

(1) Revenue is attributed to countries based on the location of the customer.

- Definition

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

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+ Details