Balance Sheet Information and Fair Value - Components of Accumulated Other Comprehensive Loss, Net of Tax (Detail) - USD ($) $ in Thousands	12 Months Ended
Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	$ (4,509)
Other comprehensive income (loss) before reclassifications	13
Amounts reclassified from accumulated other comprehensive income (loss)	(730)
Other comprehensive loss	(717)	$ (276)	$ (3,416)
Ending balance	(5,226)	(4,509)
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(4,894)
Other comprehensive income (loss) before reclassifications	(60)
Amounts reclassified from accumulated other comprehensive income (loss)	0
Other comprehensive loss	(60)
Ending balance	(4,954)	(4,894)
Unrealized Gain (Loss) on Available-for- Sale Investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	385
Other comprehensive income (loss) before reclassifications	73
Amounts reclassified from accumulated other comprehensive income (loss)	(730)
Other comprehensive loss	(657)
Ending balance	(272)	385
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(4,509)
Ending balance	$ (5,226)	$ (4,509)

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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