Note 4 - Mineral Rights and Properties - Mineral Rights and Property Acquisition Costs (Details) $ in Thousands	6 Months Ended
	Jan. 31, 2024 USD ($)
Balance	$ 572,061
Additions	1,390
Foreign exchange difference	(3,365)
Balance	570,086
Balance	(6,501)
Foreign exchange difference	3
Balance	(6,498)
Balance	565,560
Balance	563,588
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	(3,365)
Balance	382,582
Balance	(112)
Foreign exchange difference	3
Balance	(109)
Balance	384,495
Balance	382,473
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