Note 11 - Asset Retirement Obligations (Tables)

6 Months Ended

Jan. 31, 2022

Notes Tables

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

Balance, July 31, 2021	$	3,938,655
Accretion		185,140
Assumed from U1A Acquisition		12,707,248
Balance, January 31, 2022	$	16,831,043

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

	January 31, 2022			July 31, 2021
Undiscounted amount of estimated cash flows	$		28,738,663	$		8,221,018
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 2022	$	148,021
Fiscal 2023		434,262
Fiscal 2024		932,264
Fiscal 2025		1,472,226
Fiscal 2026		2,489,425
Remaining balance		23,262,465
	$	28,738,663