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Segment Reporting and Geographic Information - (Tables) | 6 Months Ended
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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.

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- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-25 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 + Details
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