Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 10,235	$ (4,422)	$ (67,498)
Other comprehensive income (loss), net of tax:
Change in net foreign currency translation adjustment	(60)	(669)	(3,408)
Available-for-sale investments:
Change in net unrealized gain (loss) (net of tax effect of $0, $0 and $5)	73	403	(8)
Less: reclassification adjustment for net gains included in net income (loss) (net of tax effect of $393, $5 and $0)	(730)	(10)	0
Net change	(657)	393	(8)
Other comprehensive loss	(717)	(276)	(3,416)
Comprehensive income (loss)	$ 9,518	$ (4,698)	$ (70,914)