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SHARE-BASED COMPENSATION (Details 3) (USD $)
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
SHARE-BASED COMPENSATION      
Expected term 4 years 1 month 6 days 4 years 1 month 6 days 4 years 1 month 6 days
Expected volatility (as a percentage) 46.90% 46.90% 46.90%
Expected dividends (as a percentage) 0.00% 0.00% 0.00%
Risk-free interest rate (as a percentage) 0.90% 1.10% 1.60%
Weighted average fair value (in dollars per share) $ 2.48 $ 2.57 $ 2.80
Contractual lives of options granted 7 years 7 years 7 years