Quarterly report pursuant to Section 13 or 15(d)

Revenue - Disaggregated by Product Lines (Details)

v3.21.2
Revenue - Disaggregated by Product Lines (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
Test Systems Segment        
Disaggregation of Revenue [Line Items]        
Sales 16,075 23,958 62,454 61,593
Electrical Power & Motion        
Disaggregation of Revenue [Line Items]        
Sales 38,650 32,481 102,742 148,500
Lighting & Safety        
Disaggregation of Revenue [Line Items]        
Sales 25,461 25,320 76,929 90,973
Avionics        
Disaggregation of Revenue [Line Items]        
Sales 14,491 16,104 47,355 57,381
Systems Certification        
Disaggregation of Revenue [Line Items]        
Sales 6,099 605 7,937 5,596
Structures        
Disaggregation of Revenue [Line Items]        
Sales 2,021 2,432 4,565 7,528
Other        
Disaggregation of Revenue [Line Items]        
Sales $ 9,044 $ 5,606 $ 26,874 $ 16,213