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SEGMENTS - Summary of Segment Reporting Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Segment Reporting Information |  |  |  |  |
Sales | $ 116,052 | $ 114,803 | $ 444,908 | $ 502,587 | $ 772,702
Total Operating (Loss) Profit |  |  | (28,674) | (100,701) | 1,701
Additions to (Deductions from) Operating Profit: |  |  |  |  |
Net Gain on Sale of Businesses | 10,677 | 0 | 10,677 | 0 | 78,801
Interest Expense, Net of Interest Income |  |  | (6,804) | (6,741) | (6,141)
Loss Before Income Taxes | (151) | (7,541) | (26,960) | (112,410) | 68,303
Total Depreciation and Amortization |  |  | 29,005 | 31,854 | 33,049
Total Assets | 609,138 | 619,745 | 609,138 | 619,745 |
Total Capital Expenditures |  |  | 6,034 | 7,459 | 12,083
Aerospace |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Sales |  |  | 365,238 | 417,988 | 692,609
Test Systems |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Sales |  |  | 79,670 | 84,599 | 80,093
Operating Segments |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Total Operating (Loss) Profit |  |  | $ (12,379) | $ (84,284) | $ 21,151
Operating Margins |  |  | (2.80%) | (16.80%) | 2.70%
Operating Segments | Aerospace |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Sales |  |  | $ 365,261 | $ 418,079 | $ 692,614
Total Operating (Loss) Profit |  |  | $ (8,614) | $ (89,833) | $ 16,657
Operating Margins |  |  | (2.40%) | (21.50%) | 2.40%
Additions to (Deductions from) Operating Profit: |  |  |  |  |
Total Depreciation and Amortization |  |  | $ 23,349 | $ 25,624 | $ 27,879
Total Assets | 458,334 | 484,885 | 458,334 | 484,885 |
Total Capital Expenditures |  |  | 4,932 | 6,494 | 11,552
Operating Segments | Test Systems |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Sales |  |  | 80,027 | 85,589 | 80,495
Total Operating (Loss) Profit |  |  | $ (3,765) | $ 5,549 | $ 4,494
Operating Margins |  |  | (4.70%) | 6.60% | 5.60%
Additions to (Deductions from) Operating Profit: |  |  |  |  |
Total Depreciation and Amortization |  |  | $ 5,022 | $ 5,577 | $ 4,534
Total Assets | 105,335 | 105,079 | 105,335 | 105,079 |
Total Capital Expenditures |  |  | 1,082 | 952 | 380
Less Inter-segment Sales | Aerospace |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Sales |  |  | (23) | (91) | (5)
Less Inter-segment Sales | Test Systems |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Sales |  |  | (357) | (990) | (402)
Corporate |  |  |  |  |
Additions to (Deductions from) Operating Profit: |  |  |  |  |
Corporate and Other Expenses, Net |  |  | (18,454) | (21,385) | (25,508)
Total Depreciation and Amortization |  |  | 634 | 653 | 636
Total Assets | $ 45,469 | $ 29,781 | 45,469 | 29,781 |
Total Capital Expenditures |  |  | $ 20 | $ 13 | $ 151

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