Annual report [Section 13 and 15(d), not S-K Item 405]

Equity Incentive Plan - Issuance of shares to consultants (Details)

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Equity Incentive Plan - Issuance of shares to consultants (Details) - shares
shares in Millions
12 Months Ended
May 31, 2025
May 31, 2024
Consultants | 2012 Equity Incentive Plan    
Share-based Compensation    
Stocks issued for severance payment 0.4 2.5