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Goodwill and Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
Goodwill by reportable segment was as follows (in thousands):
Probe CardsSystemsTotal
Goodwill, as of December 26, 2020$178,072 $34,689 $212,761 
Addition - Baldwin Park acquisition352 — 352 
Addition - HPD acquisition— 1,254 1,254 
Foreign currency translation— (2,068)(2,068)
Goodwill, as of December 25, 2021178,424 33,875 212,299 
Addition - Woburn acquisition— 550 550 
Foreign currency translation— (1,405)(1,405)
Goodwill, as of December 31, 2022$178,424 $33,020 $211,444 
Schedule of Finite-lived Intangible Assets
Intangible assets were as follows (in thousands):
December 31, 2022December 25, 2021
Other Intangible Assets GrossAccumulated AmortizationNetGrossAccumulated AmortizationNet
Existing developed technologies $171,441 $151,212 $20,229 $172,259 $148,784 $23,475 
Trade name7,972 7,759 213 8,054 7,603 451 
Customer relationships50,912 45,003 5,909 51,270 39,254 12,016 
Backlog— — — 1,896 1,896 — 
In-process research and development400 — 400 400 — 400 
$230,725 $203,974 $26,751 $233,879 $197,537 $36,342 
Schedule of Amortization Expense
Amortization expense was included in our Consolidated Statements of Income as follows (in thousands):
Fiscal Year Ended
December 31,
2022		December 25,
2021		December 26,
2020
Cost of revenues$3,225 $12,269 $21,609 
Selling, general and administrative6,166 6,478 6,382 
$9,391 $18,747 $27,991 
Schedule of Remaining Estimated Amortization Expense
The estimated future amortization of definite-lived intangible assets, excluding in-process research and development, is as follows (in thousands):
Fiscal YearAmount
2023$7,166 
20244,584 
20254,243 
20263,155 
20272,816 
Thereafter4,387 
Total$26,351