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ACQUISITION - Acquisition costs and identified assets acquired, and liabilities assumed and (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2021
Jul. 08, 2020
Dec. 31, 2019
Identified assets acquired, and liabilities assumed        
Goodwill $ 91,008 $ 90,790   $ 85,349
Neuralify acquisition        
Identified assets acquired, and liabilities assumed        
Accounts receivable     $ 226  
Contract assets     1  
Intangible assets     1,970  
Accounts payable     (79)  
Contract liabilities     (280)  
Net assets acquired     1,838  
Goodwill     $ 5,344  
Neuralify acquisition | Selling, general and administrative expenses        
Identified assets acquired, and liabilities assumed        
Acquisition related cost $ 100