FAIR VALUE MEASUREMENTS - Schedule of reconciliation of opening and closing balances for fair value measurements categorized within Level 3 (Details) - Contingent Consideration Liabilities [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Convertible Note Derivative Liability
Beginning balance	$ 5,368
Payments/Settlements	(100)
Accretion expense	212
Ending balance	$ 5,480