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 6 Months Ended
Jul. 03, 2021
Jun. 27, 2020
Jul. 03, 2021
Jun. 27, 2020
Disaggregation of Revenue [Line Items]        
Sales $ 111,158 $ 123,694 $ 217,015 $ 281,278
Aerospace Segment        
Disaggregation of Revenue [Line Items]        
Sales 89,220 102,573 170,636 243,643
Commercial Transport        
Disaggregation of Revenue [Line Items]        
Sales 47,793 67,548 86,001 170,323
Military        
Disaggregation of Revenue [Line Items]        
Sales 16,801 14,052 37,783 32,165
Business Jet        
Disaggregation of Revenue [Line Items]        
Sales 14,994 15,542 29,022 30,548
Other        
Disaggregation of Revenue [Line Items]        
Sales 9,632 5,431 17,830 10,607
Test Systems Segment        
Disaggregation of Revenue [Line Items]        
Sales 21,938 21,121 46,379 37,635
Semiconductor        
Disaggregation of Revenue [Line Items]        
Sales 0 1,188 0 2,822
Aerospace & Defense        
Disaggregation of Revenue [Line Items]        
Sales $ 21,938 $ 19,933 $ 46,379 $ 34,813