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SHAREHOLDERS' EQUITY (Tables) | 12 Months Ended
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May 31, 2014
Stockholders' Equity Note [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
| NUMBER OF STOCK OPTIONS | PRICE RANGE PER SHARE | WEIGHTED AVERAGE EXERCISE PRICE
Options outstanding at May 31, 2012 | 1,004,500 | $0.30 - $0.75 | $0.46
Options granted | 30,000 | $0.65 - $0.68 | $0.67
Options exercised | (122,375) | $0.30 - $0.73 | $0.42
Options canceled or expired | (65,625) | $0.38 - $0.73 | $0.52
Options outstanding at May 31, 2013 | 846,500 | $0.38 - $0.75 | $0.47
Options granted | 178,000 | $0.71-$0.84 | $0.75
Options exercised | (69,000) | $0.38-$0.60 | $0.51
Options canceled or expired | (95,000) | $0.43-$0.84 | $0.59
Options outstanding at May 31, 2014 | 860,500 | $0.38-$0.84 | $0.51
Schedule of Nonvested Share Activity [Table Text Block] |
|  |  |  | STOCK OPTIONS WEIGHTED AVERAGE AVERAGE GRANT DATE FAIR VALUE
|  | NUMBER OF SHARES |
Nonvested shares at May 31, 2013 |  | 408,250 |  | $ | 0.42
Granted |  | 178,000 |  | $ | 0.75
Vested/Issued |  | ( 162,250) |  | $ | 0.42
Forfeited |  | (14,000) |  | $ | 0.43
Nonvested shares at May 31, 2014 |  | 410,000 |  | $ | 0.56
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] |
RANGE OF EXERCISE PRICES | NUMBER OUTSTANDING 5/31/2014 | WEIGHTED AVERAGE REMAINING CONTRACTUAL LIFE IN YEARS | WEIGHTED AVERAGE EXERCISE PRICE | NUMBER EXERCISABLE AT MAY 31, 2014 | WEIGHTED AVERAGE EXERCISE PRICE
$ 0.30 - $ 0.50 | 602,500 | 2.30 | $ 0.41 | 371,500 | $ 0.41
$ 0.51 - $ 0.75 | 211,000 | 4.58 | $ 0.72 | 77,500 | $ 0.75
$ 0.83 - $ 0.84 | 47,000 | 3.57 | $0.84 | -- | --

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + 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 (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + 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 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Details
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