Quarterly report pursuant to Section 13 or 15(d)

Revenue - Revenue Disaggregated by Market (Details)

v3.21.1
Revenue - Revenue Disaggregated by Market (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 03, 2021
Mar. 28, 2020
Disaggregation of Revenue [Line Items]    
Sales $ 105,857 $ 157,584
Commercial Transport    
Disaggregation of Revenue [Line Items]    
Sales 38,208 102,775
Military    
Disaggregation of Revenue [Line Items]    
Sales 20,982 18,113
Business Jet    
Disaggregation of Revenue [Line Items]    
Sales 14,028 15,006
Other    
Disaggregation of Revenue [Line Items]    
Sales 8,198 5,176
Aerospace Segment    
Disaggregation of Revenue [Line Items]    
Sales 81,416 141,070
Semiconductor    
Disaggregation of Revenue [Line Items]    
Sales 0 1,634
Aerospace & Defense    
Disaggregation of Revenue [Line Items]    
Sales 24,441 14,880
Test Systems Segment    
Disaggregation of Revenue [Line Items]    
Sales $ 24,441 $ 16,514