Quarterly report pursuant to Section 13 or 15(d)

Revenue - Revenue Disaggregated by Market (Details)

v3.21.2
Revenue - Revenue Disaggregated by Market (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 02, 2021
Sep. 26, 2020
Oct. 02, 2021
Sep. 26, 2020
Disaggregation of Revenue [Line Items]        
Sales $ 111,841 $ 106,506 $ 328,856 $ 387,784
Aerospace Segment        
Disaggregation of Revenue [Line Items]        
Sales 95,766 82,548 266,402 326,191
Commercial Transport        
Disaggregation of Revenue [Line Items]        
Sales 57,549 44,067 143,550 214,390
Military        
Disaggregation of Revenue [Line Items]        
Sales 17,064 18,164 54,847 50,329
Business Jet        
Disaggregation of Revenue [Line Items]        
Sales 12,109 14,711 41,131 45,259
Other        
Disaggregation of Revenue [Line Items]        
Sales 9,044 5,606 26,874 16,213
Test Systems Segment        
Disaggregation of Revenue [Line Items]        
Sales 16,075 23,958 62,454 61,593
Semiconductor        
Disaggregation of Revenue [Line Items]        
Sales 0 585 0 3,407
Aerospace & Defense        
Disaggregation of Revenue [Line Items]        
Sales $ 16,075 $ 23,373 $ 62,454 $ 58,186