Net Income (Loss) Per Share - Calculation of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	May 31, 2016	May 31, 2015
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Net income (loss)	$ 2,784	$ (3,832)
Weighted Average Number of Shares Outstanding, Basic [Abstract]
Weighted-average shares used to compute net income (loss) per share, basic (in shares)	52,285	52,996
Dilutive shares from stock options and RSUs (in shares)	569	0
Weighted-average shares used to compute net income (loss) per share, diluted (in shares)	52,854	52,996
Earnings Per Share, Basic and Diluted [Abstract]
Net income (loss) per share, basic (in usd per share)	$ 0.05	$ (0.07)
Net income (loss) per share, diluted (in usd per share)	$ 0.05	$ (0.07)