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SHAREHOLDERS` EQUITY (Details) - Non-vested Stock Options Activity - $ / shares | 12 Months Ended
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May 31, 2018 | May 31, 2017
Non-vested Stock Options Activity [Abstract] |  |
Nonvested shares at May 31, 2017 | 517,250 |
Nonvested shares at May 31, 2017 | $ 0.96 |
Granted | 287,000 |
Granted | $ 3.63 | $ 1.55
Vested/Exercised | (212,125) |
Vested/Exercised | $ 1.00 |
Forfeited | (9,125) |
Forfeited | $ 1.56 |
Nonvested shares at May 31, 2018 | 583,000 | 517,250
Nonvested shares at May 31, 2018 | $ 2.34 | $ 0.96

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- References No definition available. + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition Number of non-vested options forfeited. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options outstanding. + References No definition available. + Details
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- Definition Number of options vested. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of options vested. + References No definition available. + Details
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