Income Taxes - Components of Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Feb. 28, 2017	Feb. 29, 2016
Deferred tax assets:
Deferred revenue	$ 65,152	$ 63,357
Stock-based compensation	9,335	6,983
Accruals and other	5,228	4,606
Research and development credits	5,436	6,484
Net operating losses	9,424	12,705
Total deferred tax assets	94,575	94,135
Valuation allowance	(77,513)	(73,399)
Total deferred tax assets, net of valuation allowance	17,062	20,736
Deferred tax liabilities:
Depreciation and amortization	(12,642)	(14,954)
Prepaid expense and other	(1,372)	(1,151)
Deferred sales commission	(4,297)	(4,117)
Total deferred tax liabilities	(18,311)	(20,222)
Net deferred tax assets (liabilities)		$ 514
Net deferred tax assets (liabilities)	$ (1,249)