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Note 9 - Asset Retirement Obligations - Undiscounted Amounts of Estimated Cash Flows for the Next Five Fiscal Years and Beyond (Details)
$ in Thousands
Jan. 31, 2024
USD ($)
Fiscal 2024 $ 1,493
Fiscal 2025 1,472
Fiscal 2026 2,489
Fiscal 2027 2,509
Fiscal 2028 1,990
Remaining balance 19,089
Undiscounted Amount of Estimated Cash Flows $ 29,042