Stockholders' Equity - Stock options outstanding and exercisable (Details) (USD $)	12 Months Ended
Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013
Number Outstanding	489,434	946,573	1,322,718
Weighted Average Exercise Price	$ 0.86	$ 0.82	$ 0.77
Number Exercisable	353,934	435,714	549,425
Stock Options
Number Outstanding	489,434
Number Exercisable	353,934
Stock Options \| Exercise Price Range $.42 to $.50
Range of exercise prices, low end (in dollars per share)	$ 0.42
Range of exercise prices, high end (in dollars per share)	$ 0.50
Number Outstanding	32,000
Weighted-Average Remaining Life in Years	7 years 5 months 12 days
Weighted Average Exercise Price	$ 0.47
Number Exercisable	21,500
Stock Options \| Exercise Price Range $.51 to $1.00
Range of exercise prices, low end (in dollars per share)	$ 0.51
Range of exercise prices, high end (in dollars per share)	$ 1.00
Number Outstanding	207,334
Weighted-Average Remaining Life in Years	7 years 2 months 30 days
Weighted Average Exercise Price	$ 0.64
Number Exercisable	197,334
Stock Options \| Exercise Price Range $1.01 to $1.95
Range of exercise prices, low end (in dollars per share)	$ 1.01
Range of exercise prices, high end (in dollars per share)	$ 1.95
Number Outstanding	250,100
Weighted-Average Remaining Life in Years	7 years 3 months 8 days
Weighted Average Exercise Price	$ 12.0
Number Exercisable	135,100

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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