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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Thousands
1 Months Ended 6 Months Ended
Apr. 30, 2018
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Contingent Consideration          
Contingent acquisition liability   $ 2,374 $ 3,665 $ 3,698 $ 6,073
Payment of contingent consideration   1,200 $ 2,594    
Saugatuck Technology Inc.          
Contingent Consideration          
Contingent acquisition liability   300      
Payment of contingent consideration $ 300        
Percentage of contingent consideration made in shares of common stock 50.00%        
Experton Group          
Contingent Consideration          
Contingent acquisition liability   400      
Payment of contingent consideration $ 500        
Percentage of contingent consideration made in shares of common stock 50.00%        
TracePoint          
Contingent Consideration          
Contingent acquisition liability   $ 1,700      
Payment of contingent consideration $ 1,600        
Percentage of contingent consideration made in shares of common stock 50.00%