Note 9 - Asset Retirement Obligations (Tables)

6 Months Ended

Jan. 31, 2026

Notes Tables

Schedule of Change in Asset Retirement Obligation [Table Text Block]

Balance, July 31, 2025	$	39,064
Accretion		1,070
Addition		715
Liabilities settled in cash		(312	)
Balance, January 31, 2026		40,537
Asset retirement obligations, current		(4,847	)
Asset retirement obligations, non-current	$	35,690

Schedule Of Estimated Cash flow and Assumption Used For ARO [Table Text Block]

	January 31, 2026		July 31, 2025
Undiscounted amount of estimated cash flows		89,097		88,669
Payable in years		1 to 37		1 to 37
Inflation rate		1.56% to 5.32%		1.56% to 5.32%
Discount rate		3.72% to 6.35%		3.72% to 6.35%