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SHAREHOLDERS' EQUITY (Details) - Non-vested Stock Options Activity | 12 Months Ended
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May 31, 2021 $ / shares shares
Non-vested Stock Options Activity [Abstract] |
Non-vested shares, number of shares | shares | 822,584
Non-vested shares, weighted average grant date fair value | $ / shares | $ 3.78
Granted, number of shares | shares | 430,616
Granted, weighted average grant date fair value | $ / shares | $ 6.73
Vested, number of shares | shares | (409,459)
Vested, weighted average grant date fair value | $ / shares | $ 3.36
Forfeited, number of shares | shares | (50,500)
Forfeited, weighted average grant date fair value | $ / shares | $ 4.80
Non-vested shares, number of shares | shares | 793,241
Non-vested shares, weighted average grant date fair value | $ / shares | $ 5.54

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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=120381028&loc=d3e5070-113901 + 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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