Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Summary of Segment Reporting Information (Details)

v3.21.2
Segment Information - Summary of Segment Reporting Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 02, 2021
Sep. 26, 2020
Oct. 02, 2021
Sep. 26, 2020
Dec. 31, 2020
Segment Reporting Information          
Sales $ 111,841 $ 106,506 $ 328,856 $ 387,784  
Segment Measure of Operating (Loss) Profit and Margins          
Total Operating Loss (4,498) (8,997) (19,930) (95,232)  
Deductions from Segment Measure of Operating Loss          
Interest Expense, Net of Interest Income 1,795 1,775 5,252 5,091  
Loss Before Income Taxes (6,839) (11,141) (26,809) (104,869)  
Total Assets 610,306   610,306   $ 619,745
Aerospace Segment          
Segment Reporting Information          
Sales 95,766 82,548 266,402 326,191  
Test Systems Segment          
Segment Reporting Information          
Sales 16,075 23,958 62,454 61,593  
Operating Segments          
Segment Measure of Operating (Loss) Profit and Margins          
Total Operating Loss $ (284) $ (5,396) $ (8,310) $ (82,297)  
Operating margins, percentage (0.30%) (5.10%) (2.50%) (21.20%)  
Operating Segments | Aerospace Segment          
Segment Reporting Information          
Sales $ 95,775 $ 82,548 $ 266,425 $ 326,282  
Segment Measure of Operating (Loss) Profit and Margins          
Total Operating Loss $ 1,917 $ (6,332) $ (6,352) $ (86,567)  
Operating margins, percentage 2.00% (7.70%) (2.40%) (26.50%)  
Deductions from Segment Measure of Operating Loss          
Total Assets $ 474,042   $ 474,042   484,885
Operating Segments | Test Systems Segment          
Segment Reporting Information          
Sales 16,128 $ 24,406 62,811 $ 62,391  
Segment Measure of Operating (Loss) Profit and Margins          
Total Operating Loss $ (2,201) $ 936 $ (1,958) $ 4,270  
Operating margins, percentage (13.70%) 3.90% (3.10%) 6.90%  
Deductions from Segment Measure of Operating Loss          
Total Assets $ 99,323   $ 99,323   105,079
Less Inter-segment Sales | Aerospace Segment          
Segment Reporting Information          
Sales (9) $ 0 (23) $ (91)  
Less Inter-segment Sales | Test Systems Segment          
Segment Reporting Information          
Sales (53) (448) (357) (798)  
Corporate Expenses and Other          
Deductions from Segment Measure of Operating Loss          
Corporate Expenses and Other 4,760 $ 3,970 13,247 $ 17,481  
Total Assets $ 36,941   $ 36,941   $ 29,781