Financial Assets and Liabilities Measured on a Recurring Basis (Detail) - Recurring Basis - USD ($) $ in Thousands	Feb. 28, 2018	Feb. 28, 2017
Current trading investments
Total value of investments	$ 286	$ 482
Current liabilities:
Margin balance	(106)	(114)
Total value of liabilities	(106)	(114)
Total	180	368
Stocks, options, and ETF (long)
Current trading investments
Current trading investments	291	484
Stocks, options, and ETF (short)
Current trading investments
Current trading investments	(5)	(2)
Level 1 Assets and Liabilities
Current trading investments
Total value of investments	286	482
Current liabilities:
Margin balance	(106)	(114)
Total value of liabilities	(106)	(114)
Total	180	368
Level 1 Assets and Liabilities \| Stocks, options, and ETF (long)
Current trading investments
Current trading investments	291	484
Level 1 Assets and Liabilities \| Stocks, options, and ETF (short)
Current trading investments
Current trading investments	$ (5)	$ (2)

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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Fair value of asset after deduction of liability.

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Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: 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(12))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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Fair value portion of liability related to investment contracts for example, but not limited to, guaranteed investment contract or annuities.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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