Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Summary of Segment Reporting Information (Details)

v3.21.1
Segment Information - Summary of Segment Reporting Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 03, 2021
Mar. 28, 2020
Dec. 31, 2020
Segment Reporting Information      
Sales $ 105,857 $ 157,584  
Segment Measure of Operating (Loss) Profit and Margins      
Total Operating Profit (9,512) (67,556)  
Additions/Deductions from Segment Measure of Operating (Loss) Profit      
Interest Expense, Net of Interest Income 1,758 1,333  
Loss Before Income Taxes (11,804) (69,277)  
Total Assets 605,957   $ 619,745
Aerospace Segment      
Segment Reporting Information      
Sales 81,416 141,070  
Test Systems Segment      
Segment Reporting Information      
Sales 24,441 16,514  
Operating Segments      
Segment Measure of Operating (Loss) Profit and Margins      
Total Operating Profit $ (4,374) $ (62,423)  
Operating margins, percentage (4.10%) (39.60%)  
Operating Segments | Aerospace Segment      
Segment Reporting Information      
Sales $ 81,430 $ 141,137  
Segment Measure of Operating (Loss) Profit and Margins      
Total Operating Profit $ (5,563) $ (63,145)  
Operating margins, percentage (6.80%) (44.80%)  
Additions/Deductions from Segment Measure of Operating (Loss) Profit      
Total Assets $ 481,134   484,885
Operating Segments | Test Systems Segment      
Segment Reporting Information      
Sales 24,745 $ 16,553  
Segment Measure of Operating (Loss) Profit and Margins      
Total Operating Profit $ 1,189 $ 722  
Operating margins, percentage 4.90% 4.40%  
Additions/Deductions from Segment Measure of Operating (Loss) Profit      
Total Assets $ 102,138   105,079
Less Inter-segment Sales | Aerospace Segment      
Segment Reporting Information      
Sales (14) $ (67)  
Less Inter-segment Sales | Test Systems Segment      
Segment Reporting Information      
Sales (304) (39)  
Corporate Expenses and Other      
Additions/Deductions from Segment Measure of Operating (Loss) Profit      
Corporate Expenses and Other 5,672 $ 5,521  
Total Assets $ 22,685   $ 29,781