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Balance Sheet Information and Fair Value - Components of Accumulated Other Comprehensive Loss, Net of Tax (Detail) - USD ($) $ in Thousands	12 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Other comprehensive income (loss) before reclassifications	$ (266)
Amounts reclassified from accumulated other comprehensive income (loss)	(10)
Other comprehensive income (loss)	(276)	$ (3,416)	$ 295
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(4,225)
Other comprehensive income (loss) before reclassifications	(669)
Amounts reclassified from accumulated other comprehensive income (loss)	0
Other comprehensive income (loss)	(669)
Ending balance	(4,894)	(4,225)
Unrealized Gain (Loss) on Available-for- Sale Investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(8)
Other comprehensive income (loss) before reclassifications	403
Amounts reclassified from accumulated other comprehensive income (loss)	(10)
Other comprehensive income (loss)	393
Ending balance	385	(8)
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(4,233)
Ending balance	$ (4,509)	$ (4,233)