Stockholders' Deficit - Summary of Stock Option Activity (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Feb. 29, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares, Beginning balance | shares	4,051,904
Shares, Granted | shares	757,285
Shares, Exercised | shares	(382,529)
Shares, Canceled/forfeited | shares	(218,459)
Shares, Ending balance | shares	4,208,201
Shares, Vested and exercisable | shares	2,478,287
Shares, Vested and expected to vest | shares	4,063,692
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted-Average Exercise Price, Outstanding, Beginning Balance (in usd per share) | $ / shares	$ 17.98
Weighted-Average Exercise Price, Granted (in usd per share) | $ / shares	31.21
Weighted-Average Exercise Price, Exercised (in usd per share) | $ / shares	12.67
Weighted-Average Exercise Price, Canceled/Forfeited (in usd per share) | $ / shares	26.16
Weighted-Average Exercise Price, Outstanding, Ending Balance (in usd per share) | $ / shares	20.42
Weighted-Average Exercise Price, Vested and exercisable (in usd per share) | $ / shares	16.34
Weighted-Average Exercise Price, Vested and expected to vest (in usd per share) | $ / shares	$ 20.02
Share-based Compensation Arrangement by Share-based Payment Award Options Outstanding Weighted Average Term [Abstract]
Weighted-Average Remaining Contractual Term, Vested and exercisable, Ending Balance	6 years 2 months 11 days
Weighted-Average Remaining Contractual Term, Vested and expected to vest, Ending Balance	7 years 10 days
Share-based Compensation Arrangement by Share-based Payment Award Options Aggregate Intrinsic Value [Abstract]
Aggregate Intrinsic Value, Vested and Exercisable, Ending Balance | $	$ 1,456,297
Aggregate Intrinsic Value, Vested and expected to vest | $	$ 1,565,624