FAIR VALUE MEASUREMENTS - Schedule of Reconciliation of Changes in Fair Value of Level III Financial Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross presentation of contingently returnable consideration to contingent purchase consideration	$ 0	$ 40
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingently returnable consideration	16,687
Gross presentation of contingently returnable consideration to contingent purchase consideration	3,676	0
Payment received	(8,750)	$ 0
Fair value, measurements, recurring | Contingent Purchase Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	(4,484)
Increase in fair value and accretion expense (included within research and development expense)	(114)
Gross presentation of contingently returnable consideration to contingent purchase consideration	(2,636)
Balance at end of period	(7,234)
Fair value, measurements, recurring | Contingently Returnable Consideration
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	0
Contingently returnable consideration	19,125
Increase in fair value	3,676
Gross presentation of contingently returnable consideration to contingent purchase consideration	2,636
Payment received	(8,750)
Balance at end of period	$ 16,687