Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance (in shares) at Feb. 28, 2014		51,045,196
Beginning balance at Feb. 28, 2014	$ (5,655)	$ 52	$ 278,551	$ (817)	$ (283,441)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		2,012,749
Issuance of common stock	16,476	$ 1	16,475
Tax withholding related to net share settlement of equity awards (in shares)		(176,943)
Tax withholding related to net share settlement of equity awards	(5,369)		(5,369)
Stock-based compensation expense	17,058		17,058
Excess tax benefits from equity compensation plans	8,947		8,947
Repayment of employee loans, net	$ 373		373
Repurchase of common stock (in shares)	0
Repurchase of common stock	$ 0
Change in unrealized gain (loss) on available-for-sale securities, net of tax effect	(8)			(8)
Foreign currency translation adjustment	(3,408)			(3,408)
Net income (loss)	(67,498)				(67,498)
Ending balance (in shares) at Feb. 28, 2015		52,881,002
Ending balance at Feb. 28, 2015	(39,084)	$ 53	316,035	(4,233)	(350,939)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		1,019,686
Issuance of common stock	4,845	$ 1	4,844
Tax withholding related to net share settlement of equity awards (in shares)		(262,511)
Tax withholding related to net share settlement of equity awards	(6,734)		(6,734)
Stock-based compensation expense	28,846		28,846
Excess tax benefits from equity compensation plans	3,788		3,788
Repayment of employee loans, net	$ 155		155
Repurchase of common stock (in shares)	(1,503,000)	(1,502,983)
Repurchase of common stock	$ (19,216)	$ (2)	(9,495)		(9,719)
Change in unrealized gain (loss) on available-for-sale securities, net of tax effect	393			393
Foreign currency translation adjustment	(669)			(669)
Net income (loss)	$ (4,422)				(4,422)
Ending balance (in shares) at Feb. 29, 2016	52,135,194	52,135,194
Ending balance at Feb. 29, 2016	$ (32,098)	$ 52	337,439	(4,509)	(365,080)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)	622,848	1,581,954
Issuance of common stock	$ 8,899	$ 1	8,898
Tax withholding related to net share settlement of equity awards (in shares)		(334,492)
Tax withholding related to net share settlement of equity awards	(7,061)		(7,061)
Stock-based compensation expense	32,705		32,705
Excess tax benefits from equity compensation plans	$ 1,909		1,909
Repurchase of common stock (in shares)	(498,000)	(498,077)
Repurchase of common stock	$ (7,596)		(3,292)		(4,304)
Issuance of common stock in connection with business combinations (in shares)		12,549
Issuance of common stock in connection with business combinations	147		147
Change in unrealized gain (loss) on available-for-sale securities, net of tax effect	(657)			(657)
Foreign currency translation adjustment	(60)			(60)
Net income (loss)	$ 10,235				10,235
Ending balance (in shares) at Feb. 28, 2017	52,897,128	52,897,128
Ending balance at Feb. 28, 2017	$ 6,423	$ 53	$ 370,745	$ (5,226)	$ (359,149)