XML 145 R111.htm IDEA: XBRL DOCUMENT v3.21.2
Accounts Payable and Accrued Liabilities - Additional Information (Details) - ABG Prince Agreement
 12 Months Ended
May 31, 2021
USD ($)
Accounts Payable Accrued Liabilities And Other Current Liabilities [Line Items]  
Royalty payment, terms on a quarterly basis until the maturity date of December 31, 2025
Royalty payment, maturity date Dec. 31, 2025
Minimum  
Accounts Payable Accrued Liabilities And Other Current Liabilities [Line Items]  
Guaranteed royalty payment $ 375,000