Annual report pursuant to Section 13 and 15(d)

DIVESTITURE ACTIVITIES (Details)

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DIVESTITURE ACTIVITIES (Details)
 3 Months Ended 12 Months Ended
Oct. 06, 2021
USD ($)
facility
Feb. 13, 2019
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Net gain on sale       $ 0 $ 0 $ 5,014,000  
Divestiture | Test Systems              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Contingent earn-outs         $ 3,400,000 $ 11,300,000 $ 10,700,000
Divestiture | Test Systems | First Earnout              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Maximum total earnout proceeds   $ 35,000,000          
Divestiture | Test Systems | Second Earnout              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Minimum total earnout proceeds   $ 0          
Disposed of by Sale | Aerospace facilities              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Number of facilities sold | facility 1            
Held for sale $ 9,200,000            
Proceeds from sale of facilities $ 8,800,000            
Net gain on sale     $ 5,000,000