Annual report pursuant to Section 13 and 15(d)

GOODWILL - Summary of Changes in Carrying Amount of Goodwill (Details)

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GOODWILL - Summary of Changes in Carrying Amount of Goodwill (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Goodwill    
Goodwill, Beginning Balance $ 58,169 $ 58,282
Foreign Currency Translations and Other 41 (113)
Goodwill, Ending Balance 58,210 58,169
Goodwill, Gross 178,911  
Accumulated Impairment Losses (120,701)  
Goodwill, Net 58,210 58,169
Aerospace    
Goodwill    
Goodwill, Beginning Balance 36,534 36,648
Foreign Currency Translations and Other 41 (114)
Goodwill, Ending Balance 36,575 36,534
Goodwill, Gross 157,276  
Accumulated Impairment Losses (120,701)  
Goodwill, Net 36,575 36,534
Test Systems    
Goodwill    
Goodwill, Beginning Balance 21,635 21,634
Foreign Currency Translations and Other 0 1
Goodwill, Ending Balance 21,635 21,635
Goodwill, Gross 21,635  
Accumulated Impairment Losses 0  
Goodwill, Net $ 21,635 $ 21,635