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Restructuring - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 28, 2013
Restructuring Cost and Reserve [Line Items]
Employee termination benefit and related expenses	$ 0.6

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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