Note 8 - Mineral Rights and Properties - Mineral Rights and Property Acquisition Costs (Details) $ in Thousands	12 Months Ended
	Jul. 31, 2023 USD ($)
Balance	$ 188,336
Additions	386,662
Impact of foreign currency translation	(2,937)
Balance	572,061
Balance	(6,388)
Additions	(1)
Impairment	(112)
Balance	(6,501)
Balance	181,948
Balance	565,560
UNITED STATES
Balance	172,340
Additions	100
Impact of foreign currency translation	0
Balance	172,440
Balance	(6,388)
Additions	(1)
Impairment	0
Balance	(6,389)
Balance	165,952
Balance	166,051
CANADA
Balance	982
Additions	386,562
Impact of foreign currency translation	(2,937)
Balance	384,607
Balance	0
Additions	0
Impairment	(112)
Balance	(112)
Balance	982
Balance	384,495
PARAGUAY
Balance	15,014
Additions	0
Impact of foreign currency translation	0
Balance	15,014
Balance	0
Additions	0
Impairment	0
Balance	0
Balance	15,014
Balance	$ 15,014