Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
Feb. 28, 2015	Feb. 28, 2014
Short-term investments:
Cost	$ 6,970,000	$ 6,260,000
Gross Unrealized Gains		1,000
Gross Unrealized Losses
Fair Value	6,971,000us-gaap_AvailableForSaleSecurities	6,261,000us-gaap_AvailableForSaleSecurities
Treasury bills [Member]
Short-term investments:
Cost		1,282,000
Gross Unrealized Gains		490
Gross Unrealized Losses
Fair Value		1,282,000
Certificates of deposit [Member]
Short-term investments:
Cost	6,970,000	4,978,000
Gross Unrealized Gains	1,000	510
Gross Unrealized Losses
Fair Value	$ 6,971,000	$ 4,979,000

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

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+ References

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

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Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

+ References

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-Name Accounting Standards Codification

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Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

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