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Goodwill and Intangible Assets (Tables)
 3 Months Ended
Mar. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill by Reportable Segments
Goodwill by reportable segment was as follows (in thousands):
Probe CardsSystemsTotal
Goodwill, as of December 31, 2022$178,424 $33,020 $211,444 
Reduction - FRT divestiture— (10,660)(10,660)
Foreign currency translation— 306 306 
Goodwill, as of December 30, 2023178,424 22,666 201,090 
Reduction - China divestiture(1,055)(62)(1,117)
Foreign currency translation— (320)(320)
Goodwill, as of March 30, 2024$177,369 $22,284 $199,653 
Schedule of Intangible Assets
Intangible assets were as follows (in thousands):
March 30, 2024December 30, 2023
Intangible Assets GrossAccumulated
Amortization		NetGrossAccumulated
Amortization		Net
Existing developed technologies $159,341 $148,642 $10,699 $159,593 $148,445 $11,148 
Customer relationships47,945 46,816 1,129 48,022 46,712 1,310 
Trade name7,779 7,710 69 7,808 7,728 80 
In-process research and development400 — 400 400 — 400 
$215,465 $203,168 $12,297 $215,823 $202,885 $12,938 
Schedule of Amortization Expense
Amortization expense was included in our Condensed Consolidated Statements of Income as follows (in thousands):
 Three Months Ended
 March 30,
2024		April 1,
2023
Cost of revenues$449 $831 
Selling, general and administrative191 1,547 
$640 $2,378 
Schedule of Estimated Amortization of Intangible Assets
The estimated future amortization of definite-lived intangible assets, excluding in-process research and development, is as follows (in thousands):
Fiscal YearAmount
Remainder of 2024$1,921 
20252,330 
20261,630 
20271,630 
20281,630 
Thereafter2,756 
$11,897