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Note 12 - Asset Retirement Obligations - Undiscounted Amounts of Estimated Cash Flows for the Next Five Fiscal Years and Beyond (Details)
$ in Thousands
Jul. 31, 2022
USD ($)
Fiscal 2023 $ 214
Fiscal 2024 1,300
Fiscal 2025 1,472
Fiscal 2026 2,489
Fiscal 2027 2,509
Remaining balance 20,755
Undiscounted Amount of Estimated Cash Flows $ 28,739