Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Details)

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Segment Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 29, 2024
Jul. 01, 2023
Jun. 29, 2024
Jul. 01, 2023
Dec. 31, 2023
Segment Reporting Information          
Sales $ 198,114 $ 174,454 $ 383,188 $ 330,992  
Segment Measure of Operating Profit and Margins          
Total Segment Measure of Operating Profit 7,550 2,396 9,216 26  
(Additions to) Deductions from Segment Measure of Operating Profit:          
Net Gain on Sale of Business 0 0 0 (3,427)  
Interest Expense, Net of Interest Income 5,856 5,920 11,615 11,390  
(Loss) Income Before Income Taxes 1,259 (3,902) (3,270) (7,027)  
Deferred revenue liability 9,000 10,600 15,200 19,500  
Total Assets 644,859   644,859   $ 633,792
Aerospace          
Segment Reporting Information          
Sales 176,943 158,382 340,581 293,979  
Test Systems          
Segment Reporting Information          
Sales 21,171 16,072 42,607 37,013  
Operating Segments          
Segment Measure of Operating Profit and Margins          
Total Segment Measure of Operating Profit $ 13,944 $ 7,576 $ 22,962 $ 11,066  
Operating margins, percentage 7.00% 4.30% 6.00% 3.30%  
Operating Segments | Aerospace          
Segment Reporting Information          
Sales $ 176,948 $ 158,386 $ 340,623 $ 294,101  
Segment Measure of Operating Profit and Margins          
Total Segment Measure of Operating Profit $ 19,280 $ 13,719 $ 31,377 $ 17,806  
Operating margins, percentage 10.90% 8.70% 9.20% 6.10%  
(Additions to) Deductions from Segment Measure of Operating Profit:          
Total Assets $ 504,462   $ 504,462   493,660
Operating Segments | Test Systems          
Segment Reporting Information          
Sales 21,171 $ 16,072 42,607 $ 37,013  
Segment Measure of Operating Profit and Margins          
Total Segment Measure of Operating Profit $ (5,336) $ (6,143) $ (8,415) $ (6,740)  
Operating margins, percentage (25.20%) (38.20%) (19.80%) (18.20%)  
(Additions to) Deductions from Segment Measure of Operating Profit:          
Deferred revenue liability       $ 5,800  
Total Assets $ 123,294   $ 123,294   122,681
Less Inter-segment Sales | Aerospace          
Segment Reporting Information          
Sales (5) $ (4) (42) (122)  
Less Inter-segment Sales | Test Systems          
Segment Reporting Information          
Sales 0 0 0 0  
Corporate Expenses and Other          
(Additions to) Deductions from Segment Measure of Operating Profit:          
Corporate Expenses and Other 6,829 $ 5,558 14,617 10,130  
Income associated with reversal of liability related to equity investment       $ 1,800  
Total Assets $ 17,103   $ 17,103   $ 17,451