Income Taxes - Reconciliation of Statutory Federal Income Tax Rate to Effective Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
Income Tax Disclosure [Abstract]
Tax benefit at federal statutory rate	$ (2,502)	$ (1,608)	$ (3,833)
State taxes, net of federal benefit	(363)	4,845	(713)
Non-deductible expenses	368	823	736
Stock-based compensation	2,134	520	1,227
Legal entity rationalization	0	0	(3,541)
Transaction costs	732	(1,454)	0
Change in valuation allowance	1,674	58,685	346
Foreign rate differential	(2,752)	2,730	790
Research and development credits	(2,482)	(1,792)	(933)
Domestic production activities deduction	(63)	0	(445)
Litigation settlements	584	0	0
Other	(57)	153	(199)
Provision for (benefit from) income taxes	$ (2,727)	$ 62,902	$ (6,565)