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Note 24 - Financial Risk Management and Financial Instruments - Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands
Aug. 31, 2025
May 31, 2025
May 31, 2024
Equity investments measured at fair value $ 2,012   $ 1,972
Digital assets 992    
Contingent consideration 0 $ (15,000)  
Fair Value, Recurring [Member]      
Cash and cash equivalents 264,828 221,666  
Equity investments measured at fair value 10,172 10,132  
Digital assets 992    
Warrant liability (4,762) (1,092)  
Contingent consideration 0 (15,000)  
Total recurring fair value measurements 271,230 250,403  
Marketable securities   34,697  
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]      
Cash and cash equivalents 264,828 221,666  
Equity investments measured at fair value 995 909  
Digital assets 992    
Warrant liability 0 0  
Contingent consideration 0 0  
Total recurring fair value measurements 266,815 257,272  
Marketable securities   34,697  
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]      
Cash and cash equivalents 0 0  
Equity investments measured at fair value 1,017 1,063  
Digital assets 0    
Warrant liability 0 0  
Contingent consideration 0 0  
Total recurring fair value measurements 1,017 1,063  
Marketable securities   0  
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]      
Cash and cash equivalents 0 0  
Equity investments measured at fair value 8,160 8,160  
Digital assets 0    
Warrant liability (4,762) (1,092)  
Contingent consideration 0 (15,000)  
Total recurring fair value measurements $ 3,398 (7,932)  
Marketable securities   $ 0