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Goodwill and Intangible Assets - Goodwill (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2023
Dec. 31, 2022
Goodwill [Roll Forward]    
Goodwill, beginning balance $ 211,444 $ 212,299
Reduction - FRT divestiture (10,660)  
Foreign currency translation 306 (1,405)
Goodwill, ending balance 201,090 211,444
Woburn    
Goodwill [Roll Forward]    
Goodwill, acquired during period   550
Probe Cards    
Goodwill [Roll Forward]    
Goodwill, beginning balance 178,424 178,424
Reduction - FRT divestiture 0  
Foreign currency translation 0 0
Goodwill, ending balance 178,424 178,424
Probe Cards | Woburn    
Goodwill [Roll Forward]    
Goodwill, acquired during period   0
Systems    
Goodwill [Roll Forward]    
Goodwill, beginning balance 33,020 33,875
Reduction - FRT divestiture (10,660)  
Foreign currency translation 306 (1,405)
Goodwill, ending balance $ 22,666 33,020
Systems | Woburn    
Goodwill [Roll Forward]    
Goodwill, acquired during period   $ 550