Note 24 - Financial Risk Management and Financial Instruments - Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Aug. 31, 2026	May 31, 2026
Digital assets	$ 720
Fair Value, Inputs, Level 1 [Member]
Equity investments measured at fair value	1,025	$ 1,197
Fair Value, Inputs, Level 2 [Member]
Equity investments measured at fair value	976	990
Fair Value, Recurring [Member]
Cash and cash equivalents	214,960	225,977
Restricted cash	3,383
Marketable securities	3,047	5,289
Equity investments measured at fair value	6,365	6,551
Digital assets	720
Total recurring fair value measurements	228,475	237,817
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	214,960	225,977
Restricted cash	3,383
Marketable securities	3,047	5,289
Equity investments measured at fair value	1,025	1,197
Digital assets	720
Total recurring fair value measurements	223,135	232,463
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalents	0	0
Restricted cash	0
Marketable securities	0	0
Equity investments measured at fair value	976	990
Digital assets	0
Total recurring fair value measurements	976	990
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Cash and cash equivalents	0	0
Restricted cash	0
Marketable securities	0	0
Equity investments measured at fair value	4,364	4,364
Digital assets	0
Total recurring fair value measurements	$ 4,364	$ 4,364