STOCKHOLDERS' EQUITY (Stock-based Compensation Expense) (Details) (USD $)	12 Months Ended
Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013
Allocated Share-based Compensation Expense	$ 4,100,000	$ 2,924,000	$ 2,910,000
Unrecognized share-based compensation cost	10,000,000
Unrecognized compensation cost, recognition period	2 years 8 months 12 days
Cost of revenues [Member]
Allocated Share-based Compensation Expense	241,000	191,000	136,000
Research and development [Member]
Allocated Share-based Compensation Expense	613,000	516,000	450,000
Selling [Member]
Allocated Share-based Compensation Expense	591,000	360,000	252,000
General and administrative [Member]
Allocated Share-based Compensation Expense	$ 2,655,000	$ 1,857,000	$ 2,072,000

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

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

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-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

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-Subparagraph (SAB TOPIC 14.F)

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

-Publisher FASB

-Name Accounting Standards Codification

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

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

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-SubTopic 10

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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