Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND OTHER INTANGIBLE ASSETS - Summary of changes in goodwill (Details)

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GOODWILL AND OTHER INTANGIBLE ASSETS - Summary of changes in goodwill (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2022
Summary of changes in goodwill      
Balance at beginning of period $ 72,510 $ 66,262 $ 66,262
Foreign currency translation adjustments (702) (463)  
Balance at end of period 78,027 72,510 78,027
Products      
Summary of changes in goodwill      
Balance at beginning of period 69,894 63,646 63,646
Foreign currency translation adjustments (702) (463)  
Balance at end of period 75,411 69,894 75,411
Distribution      
Summary of changes in goodwill      
Balance at beginning of period 2,616 2,616 2,616
Balance at end of period 2,616 2,616 2,616
Radar      
Summary of changes in goodwill      
Acquisition measurement period adjustment (422)   $ (422)
Acquisition   6,711  
Radar | Products      
Summary of changes in goodwill      
Acquisition measurement period adjustment (422)    
Acquisition   $ 6,711  
Cyalume      
Summary of changes in goodwill      
Acquisition 6,641    
Cyalume | Products      
Summary of changes in goodwill      
Acquisition $ 6,641