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FAIR VALUE MEASUREMENTS - Reconciliation of Changes in Level 3 Assets and Liabilities (Details) - Fair value, measurements, recurring
$ in Thousands
3 Months Ended
Jun. 30, 2019
USD ($)
Contingent Consideration  
Balance at March 31, 2019 $ 762
Change in fair value of contingent consideration (523)
Balance at June 30, 2019 239
Contingent Purchase Consideration  
Balance at March 31, 2019 0
Additions to Level 3 (1,000)
Balance at June 30, 2019 $ (1,000)