Note 8 - Mineral Rights and Properties (Tables)

12 Months Ended

Jul. 31, 2023

Notes Tables

Schedule Of Mineral Rights and Property Acquisition Costs [Table Text Block]

Costs	United States			Canada			Paraguay		Total
Balance at July 31, 2022	$	172,340		$	982		$	15,014	$	188,336
Additions		100			386,562			-		386,662
Impact of foreign currency translation		-			(2,937	)		-		- 2,937
Balance at July 31, 2023		172,440			384,607			15,014		572,061
Accumulated Depletion, Amortization and Impairment	United States			Canada			Paraguay		Total
Balance at July 31, 2022		(6,388	)		-			-		(6,388	)
Additions		(1	)		-			-		(1	)
Impairment		-			(112	)		-		(112	)
Balance at July 31, 2023		(6,389	)		(112	)		-		(6,501	)
Carrying Value
Balance at July 31, 2022	$	165,952		$	982		$	15,014	$	181,948
Balance at July 31, 2023	$	166,051		$	384,495		$	15,014	$	565,560

Schedule Of Mineral Property Expenditures Incurred by Major Projects [Table Text Block]

	Year Ended July 31,
	2023		2022		2021
Permitting and compliance	$	396	$	676	$	203
Property maintenance		3,608		2,635		1,493
Exploration		9,308		2,582		1,751
Development		1,749		1,995		108
Production readiness		3,559		2,266		924
Total	$	18,620	$	10,154	$	4,479