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FAIR VALUE MEASUREMENTS - Schedule of reconciliation of opening and closing balances for fair value measurements categorized within Level 3 (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2016
Mar. 31, 2016
Contingent Consideration Liability [Member]    
Convertible Note Derivative Liability    
Beginning balance $ 3,956 $ 3,686
Payments   (17)
Accretion expense 183 287
Valuation gain for the period 0 0
Ending balance 4,139 3,956
Derivative Financial Instruments, Liabilities [Member]    
Convertible Note Derivative Liability    
Beginning balance 16,901 33,337
Payments   0
Accretion expense 0 0
Valuation gain for the period 3,571 (16,436)
Ending balance $ 20,472 $ 16,901