FAIR VALUE MEASUREMENTS Reconciliation of Changes in Fair Value of Level Three Financial Liabilities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Payments	$ 841	$ 4,038	$ 846
Fair value, measurements, recurring | Contingent Purchase Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at March 31, 2013	(5,087)
(Increase) / decrease in fair value and accretion expense (included within research and development expense)	(45)
Payments	841	4,038
Balance at March 31, 2014	(4,291)	(5,087)
Fair value, measurements, recurring | Contingent Contractual Non-compliance Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at March 31, 2013	(246)
(Increase) / decrease in fair value and accretion expense (included within research and development expense)	197
Payments	0	270
Balance at March 31, 2014	$ (49)	$ (246)