Rollforward of Allowance for Doubtful Accounts (Detail) (Allowance for Doubtful Accounts, Current, USD $) In Thousands, unless otherwise specified	12 Months Ended
Feb. 28, 2013	Feb. 29, 2012
Allowance for Doubtful Accounts, Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at Beginning of Period	$ 176	$ 134
Additions: Charged to Costs and Expenses	83	232
Deductions	199	190
Balance at End of Period	$ 60	$ 176

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Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690

+ Details

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- Definition

+ References

+ Details

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- Definition

Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

+ References

+ Details

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