Segment Reporting and Geographic Information - (Tables)

6 Months Ended

Jun. 28, 2025

Segment Reporting [Abstract]

Schedule of Revenue from External Customers by Products and Services

The following table lists the different sources of revenue:

	Three Months Ended								Six Months Ended
	June 28,				June 29,				June 28,				June 29,
	2025				2024				2025				2024
	(in thousands, except for percentages)
Systems and software	$	214,506	84	%	$	210,428	87	%	$	445,656	86	%	$	405,264	86	%
Parts		19,849	8	%		16,788	7	%		38,025	8	%		36,896	8	%
Services		19,242	8	%		15,111	6	%		36,523	6	%		29,012	6	%
Total revenue	$	253,597	100	%	$	242,327	100	%	$	520,204	100	%	$	471,172	100	%

Schedule of Segment Reporting Information, by Segment [Table Text Block]

The table below presents the Company’s consolidated operating results including significant segment expenses:

	Three Months Ended						Six Months Ended
	June 28,			June 29,			June 28,			June 29,
	2025			2024			2025			2024
	(in thousands)
Revenue	$	253,597		$	242,327		$	520,204		$	471,172
Less:
Adjusted cost of revenue (1)		115,284			113,353			235,023			223,090
Adjusted research and development (2)		35,292			27,083			64,012			53,441
Adjusted sales and marketing (2)		14,910			18,881			34,626			37,104
Adjusted general and administrative (3)		22,496			18,480			44,432			35,708
Other segment items:
Restructuring and other (4)		22,415			1,324			27,174			2,370
Merger and acquisitions related  (4)		2,507			1,264			2,665			1,638
Litigation (4)		—			(3	)		—			27
Amortization		8,446			13,112			16,891			26,224
Operating income		32,247			48,833			95,381			91,570
Interest income, net		8,631			8,496			17,897			15,857
Other (expense) income, net		(1,137	)		(60	)		(1,880	)		734
Provision for income taxes		5,830			4,320			13,392			8,359
Net income	$	33,911		$	52,949		$	98,006		$	99,802
(1) Excludes restructuring and other expenses and merger and acquisition related expenses
(2) Excludes merger and acquisition related expenses
(3) Excludes litigation expenses and merger and acquisition related expenses
(4) The Company excludes these expenses in order to provide better comparability between periods as they are not representative of the Company's ongoing operations.

Depreciation expense is a significant expense related to research and development expenses, sales and marketing expenses and general and administrative expenses as shown above. For the six-months ended June 28, 2025 and June 29, 2024, depreciation expense was $10.2 million and $6.9 million, respectively.

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area

For geographical revenue reporting, revenue is attributed to the geographic location to which the product is shipped. Revenue by geographic region is as follows:

	Three Months Ended				Six Months Ended
	June 28,		June 29,		June 28,		June 29,
	2025		2024		2025		2024
	(in thousands)
Revenue from third parties:
South Korea	$	82,650	$	70,705	$	175,964	$	150,943
Taiwan		65,616		59,630		168,197		130,733
United States		27,556		18,916		53,153		39,784
Japan		33,768		19,278		42,137		32,613
China		17,337		33,115		29,513		54,110
Europe		12,846		16,553		29,390		22,782
Southeast Asia		13,824		24,130		21,850		40,207
Total revenue	$	253,597	$	242,327	$	520,204	$	471,172

Schedule of Revenue by Major Customer by Reporting Segments

The following customers accounted for 10% or more of total revenue for the indicated periods:

	Six Months Ended
	June 28,			June 29,
	2025			2024
Customer A		22	%		23	%
Customer B		18	%		20	%
Customer C		17	%		13	%

Two customers’ net accounts receivable balances were individually greater than 10% of net accounts receivable at June 28, 2025, representing, in the aggregate approximately 37% of the Company’s total net accounts receivable.

Two customers’ net accounts receivable balances were individually greater than 10% of net accounts receivable at December 28, 2024, representing, in the aggregate, approximately 47% of the Company’s total net accounts receivable.

Substantially all of the Company’s long-lived assets are located within the United States of America.