Note 4 - Mineral Rights and Properties - Mineral Rights and Property Acquisition Costs (Details) $ in Thousands	9 Months Ended
	Apr. 30, 2024 USD ($)
Balance	$ 572,061
Additions	1,390
Foreign exchange difference	(8,520)
Balance	564,931
Balance	(6,501)
Foreign exchange difference	6
Balance	(6,495)
Balance	565,560
Balance	558,436
UNITED STATES
Balance	172,440
Additions	50
Foreign exchange difference	0
Balance	172,490
Balance	(6,389)
Foreign exchange difference	0
Balance	(6,389)
Balance	166,051
Balance	166,101
CANADA
Balance	384,607
Additions	1,340
Foreign exchange difference	(8,520)
Balance	377,427
Balance	(112)
Foreign exchange difference	6
Balance	(106)
Balance	384,495
Balance	377,321
PARAGUAY
Balance	15,014
Additions	0
Foreign exchange difference	0
Balance	15,014
Balance	0
Foreign exchange difference	0
Balance	0
Balance	15,014
Balance	$ 15,014