2. STOCK-BASED COMPENSATION (Details Narrative) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Aug. 31, 2013	Aug. 31, 2012
Stock-based compensation expense related to stock options	$ 134	$ 151
Unrecognized stock-based compensation cost related to unvested stock-based awards	1,223
Estimated forfeitures of unvested stock based awards	3
Weighted average remaining period of the underlying options	5 years 6 months
Intrinsic value of options exercised	43	42
Weighted average remaining contractual life of the options exercisable and expected to be exercisable	4 years 4 months 6 days
Options Exercisable	1,816	1,541
Weighted Average Exercise Price Options Excercisable	$ 1.28	$ 2.70
Employee Stock Purchase Plan
Weighted average remaining period of the underlying options	8 months 12 days
Stock-based compensation related to the ESPP	9	18
Compensation cost related to options to purchase the Company's common stock under the ESPP but not yet recognized	$ 8

No authoritative reference available.

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No authoritative reference available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ 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 (i)

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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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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

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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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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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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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Weighted average remaining contractual term for fully vested and expected to vest options that are exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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