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Note 6 - Promissory Note (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Aug. 31, 2024
May 31, 2024
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] us-gaap:PrimeRateMember  
Barrick [Member] | Notes Payable, Other Payables [Member]    
Notes Payable $ 147,880  
Debt Instrument, Face Amount 51,576  
Interest Payable $ 96,304  
Debt Instrument, Basis Spread on Variable Rate 2.00% 2.00%
Percentage of Specified Revenue from Which the Promissory Note and Accrued Interest Are Payable 85.00%