Earnings Per Share - Outstanding Shares of Potentially Dilutive Securities Excluded from Computation of Diluted Net Income Per Share of Common Stock (Detail)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from the computation of diluted net income per share of common stock	67,736	91,239	15,698,135
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from the computation of diluted net income per share of common stock	57,085	91,239	379,304
Restricted Stock Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from the computation of diluted net income per share of common stock	10,651	0	16,700
Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from the computation of diluted net income per share of common stock	0	0	15,221,571
Convertible Preferred Stock Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from the computation of diluted net income per share of common stock	0	0	80,560