CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balances at Feb. 28, 2014	$ 359	$ 206,154	$ (73,301)	$ (65)	$ 133,147
Balances (in shares) at Feb. 28, 2014	35,859
Net income (loss)			16,508		16,508
Stock-based compensation expense		4,100			4,100
Issuance of shares for restricted stock awards	$ 1	(1)
Issuance of shares for restricted stock awards (in shares)	106
Shares issued on net share settlement of equity awards	$ 1	(3,089)			(3,088)
Shares issued on net share settlement of equity awards (in shares)	117
Exercise of stock options	$ 1	717			718
Exercise of stock options (in shares)	143
Foreign currency cumulative translation adjustment
Balances at Feb. 28, 2015	$ 362	207,881	(56,793)	(65)	151,385
Balances (in shares) at Feb. 28, 2015	36,225
Net income (loss)			16,940		16,940
Stock-based compensation expense		5,854			5,854
Equity component of convertible senior notes, net of tax		20,104			20,104
Purchase of note hedges, net of tax		(19,324)			(19,324)
Sale of warrants		15,991			15,991
Issuance of shares for restricted stock awards	$ 1	(1)
Issuance of shares for restricted stock awards (in shares)	115
Shares issued on net share settlement of equity awards	$ 1	(2,626)			(2,625)
Shares issued on net share settlement of equity awards (in shares)	99
Exercise of stock options	$ 3	1,280			1,283
Exercise of stock options (in shares)	228
Foreign currency cumulative translation adjustment				(161)	(161)
Balances at Feb. 29, 2016	$ 367	229,159	(39,853)	(226)	189,447
Balances (in shares) at Feb. 29, 2016	36,667
Net income (loss)			(7,904)		(7,904)
Stock-based compensation expense		7,833			7,833
Issuance of shares for restricted stock awards	$ 1	(1)
Issuance of shares for restricted stock awards (in shares)	149
Shares issued on net share settlement of equity awards	$ 2	(1,782)			(1,782)
Shares issued on net share settlement of equity awards (in shares)	150
Exercise of stock options	$ 1	960			961
Exercise of stock options (in shares)	125
Repurchase of common stock	$ (18)	(24,982)			(25,000)
Repurchase of common stock (in shares)	(1,761)
Foreign currency cumulative translation adjustment					(280)
Other comprehensive loss, net of tax				(315)	(315)
Balances at Feb. 28, 2017	$ 353	$ 211,187	$ (47,757)	$ (541)	$ 163,242
Balances (in shares) at Feb. 28, 2017	35,330