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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 4	$ 501
Common stock, $0.001 par value:	$ 1.000	$ 1.000
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	77,447,989	77,376,903
Common stock, shares outstanding (in shares)	77,447,989	77,376,903
Goodwill	$ 200,137	$ 201,090
Probe Cards
Goodwill	177,369	178,424
Systems
Goodwill	$ 22,768	$ 22,666

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