Note 6 - Mineral Rights and Properties - Mineral Rights and Property Acquisition Costs (Details) - USD ($) $ in Thousands	6 Months Ended
	Jan. 31, 2023	Jul. 31, 2022
Balance	$ 188,336
Additions (Note 3 and 4)	386,497
Impact of foreign currency translation	(5,594)
Balance	569,239
Balance, July 31, 2022	(6,388)
Additions	(1)
Balance, January 31, 2023	(6,389)
Mineral rights and properties	562,850	$ 181,948
UNITED STATES
Balance	172,340
Additions (Note 3 and 4)	50
Impact of foreign currency translation	0
Balance	172,390
Balance, July 31, 2022	(6,388)
Additions	(1)
Balance, January 31, 2023	(6,389)
Mineral rights and properties	166,001	165,952
CANADA
Balance	982
Additions (Note 3 and 4)	386,447
Impact of foreign currency translation	(5,594)
Balance	381,835
Balance, July 31, 2022	0
Additions	0
Balance, January 31, 2023	0
Mineral rights and properties	381,835	982
PARAGUAY
Balance	15,014
Additions (Note 3 and 4)	0
Impact of foreign currency translation	0
Balance	15,014
Balance, July 31, 2022	0
Additions	0
Balance, January 31, 2023	0
Mineral rights and properties	$ 15,014	$ 15,014