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Concentrations of Risk - Additional Information (Detail) - USD ($)	Aug. 31, 2015	Feb. 28, 2015	Aug. 31, 2014	Feb. 28, 2014
Concentration Risk [Line Items]
Minimum Insurance available to depositors under the FDIC's general deposit insurance rules	$ 250,000
Cash balances not federally insured	15,600,000
Cash in bank accounts	18,851,000	$ 15,346,000	$ 13,782,000	$ 5,316,000
Canada [Member]
Concentration Risk [Line Items]
Cash in bank accounts	700,000
Mexico [Member]
Concentration Risk [Line Items]
Cash in bank accounts	$ 1,800,000

X

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Glossary Cash



-URI http://asc.fasb.org/extlink&oid=6506951



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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section 45



-Paragraph 1



-Subparagraph (a)



-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 230



-SubTopic 10



-Section 45



-Paragraph 4



-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3044-108585



Reference 4: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Glossary Cash Equivalents



-URI http://asc.fasb.org/extlink&oid=6507016



Reference 5: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.1)



-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- Definition

The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

+ References

No definition available.

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- Definition

The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.

+ References

No definition available.

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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