FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES (Details) (USD $) In Thousands, except Share data in Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Activities related to contingent consideration
Beginning balance	$ 1,151	$ 1,293
Additions to accrual	25,000	513
Payments	(1,151)	(655)
Ending balance	25,000	1,151
Warrant
Financial Instruments Measured at Fair Value on a Recurring Basis
Number of shares that can be purchased out of warrants issued	1.35
Weighted-average price of warrant (in dollars per share)	$ 7.33
Remaining life	5 years
Volatility (as a percent)	58.00%
Dividend yield (as a percent)	0.00%
Risk-free rate (as a percent)	0.80%
Changes in fair value adjustment of warrants
Fair value adjustment	74,437
Balance, end of the period	$ 74,437