Note 11 - Asset Retirement Obligations (Tables)

6 Months Ended

Jan. 31, 2023

Notes Tables

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

Balance, July 31, 2022	$	17,276
Accretion		472
Assumed from Roughrider Acquisition (Note 4)		445
Assumed from UEX Acquisition (Note 3)		211
Liabilities settled in cash		(6	)
Foreign exchange adjustment		(6	)
Balance, January 31, 2023		18,392
Asset retirement obligations, current		362
Asset retirement obligations, non-current	$	18,030

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

	January 31, 2023					July 31, 2022
Undiscounted amount of estimated cash flows	$			29,212		$			28,739
Payable in years		1	to	23			1	to	23
Inflation rate		1.56%	to	5.32	%		1.56%	to	5.32	%
Discount rate		3.72%	to	6.35	%		3.72%	to	6.35	%

Schedule Of Undiscounted Amounts Of Estimated Cash Flows [Table Text Block]

Fiscal 2023	$	362
Fiscal 2024		1,300
Fiscal 2025		1,472
Fiscal 2026		2,489
Fiscal 2027		2,509
Remaining balance		21,080
	$	29,212