Note 4 - Mineral Rights and Properties - Mineral Rights and Property Acquisition Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2024	Jul. 31, 2024
Balance	$ 564,077
Additions	114
Impact of foreign currency translation	(1,514)
Balance	(562,677)
Balance	(6,494)
Additions	(226)
Impact of foreign currency translation	1
Balance	(6,719)
Balance	555,958	$ 557,583
UNITED STATES
Balance	172,540
Additions	114
Impact of foreign currency translation	0
Balance	(172,654)
Balance	(6,389)
Additions	(226)
Impact of foreign currency translation	0
Balance	(6,615)
Balance	166,039	166,151
CANADA
Balance	376,523
Additions	0
Impact of foreign currency translation	(1,514)
Balance	(375,009)
Balance	(105)
Additions	0
Impact of foreign currency translation	1
Balance	(104)
Balance	374,905	376,418
PARAGUAY
Balance	15,014
Additions	0
Impact of foreign currency translation	0
Balance	(15,014)
Balance	0
Additions	0
Impact of foreign currency translation	0
Balance	0
Balance	$ 15,014	$ 15,014