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SUMMARY OF SIGNIFICANT ACCOUNTING PRINCIPLES AND PRACTICES - Narrative (Details) |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Oct. 03, 2021 USD ($) | Dec. 31, 2022 USD ($) | Oct. 01, 2022 USD ($) | Apr. 02, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2022 USD ($) segment | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jan. 19, 2023 USD ($) | Sep. 30, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  | 2 |  |  |  |
Research and development, design and related engineering |  |  |  |  |  | $ 48,300,000 | $ 43,300,000 | $ 40,200,000 |  |
Cash and cash equivalents maturity period (in months) |  |  |  |  |  | 3 months |  |  |  |
Depreciation expense |  |  |  |  |  | $ 12,000,000 | 12,700,000 | 13,300,000 |  |
Unamortized balance of deferred financing costs |  | $ 3,200,000 |  |  | $ 400,000 | 3,200,000 | 400,000 |  |  |
Debt issuance costs |  | 3,600,000 |  |  |  | 3,600,000 |  |  |  |
Net gain on sale |  | 0 |  |  | 5,014,000 | 0 | 5,014,000 | 0 |  |
Impairment charge | $ 0 | $ 0 |  |  |  | 0 | 0 | 86,300,000 |  |
Equity investment impairment |  |  |  |  |  | 0 | 0 | 3,493,000 |  |
Cash dividends paid |  |  |  |  |  | 0 | 0 | 0 |  |
Term Loan Agreement | Subsequent Event |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |
Debt issuance costs |  |  |  |  |  |  |  |  | $ 6,100,000 |
Term Loan Agreement | Subsequent Event | Line of Credit |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  |  |  |  |  |  | 90,000,000 |
Sixth Amended And Restated Credit Agreement | Subsequent Event | Line of Credit | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  | $ 115,000,000 |
Federal |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |
Valuation allowance adjustment |  |  |  |  |  | 11,900,000 | 6,000,000 | $ 23,300,000 |  |
Foreign Tax Authority |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |
Valuation allowance adjustment |  |  |  |  |  | $ 400,000 | 1,300,000 |  |  |
Disposal Group, Held-for-sale, Not Discontinued Operations | Aerospace facilities |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |
Net gain on sale |  |  |  |  | $ 5,000,000 |  | 5,000,000 |  |  |
Building | Minimum |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, useful life (in years) |  |  |  |  |  | 25 years |  |  |  |
Building | Maximum |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, useful life (in years) |  |  |  |  |  | 40 years |  |  |  |
Machinery and Equipment | Minimum |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, useful life (in years) |  |  |  |  |  | 4 years |  |  |  |
Machinery and Equipment | Maximum |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, useful life (in years) |  |  |  |  |  | 10 years |  |  |  |
United States Department Of Transportation | Grant |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |
USDOT grant receivable amount (up to) |  |  |  |  |  |  |  |  |  | $ 14,700,000
Portion of grant received |  |  | $ 2,100,000 | $ 5,200,000 |  |  | 7,400,000 |  |  |
Revenue recognized included in contract liability balance |  |  |  |  |  | $ 6,000,000 | $ 8,700,000 |  |  |

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