Note 12 - Asset Retirement Obligations (Tables)

12 Months Ended

Jul. 31, 2022

Notes Tables

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

	July 31, 2022		July 31, 2021
Balance, beginning of year	$	3,939	$	3,735
Accretion		630		204
Assumed from U1A Acquisition		12,707		-
Balance, end of year	$	17,276	$	3,939

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

	July 31, 2022			July 31, 2021
Undiscounted amount of estimated cash flows	$28,739			$8,221
Payable in years	1	to	23		9	to	21
Inflation rate	1.56%	to	5.32%		1.56%	to	2.17%
Discount rate	3.72%	to	6.35%		5.50%	to	5.96%

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

Fiscal 2023	$	214
Fiscal 2024		1,300
Fiscal 2025		1,472
Fiscal 2026		2,489
Fiscal 2027		2,509
Remaining balance		20,755
	$	28,739