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Note 5 - Oil and Gas Leases - Company's Royalty and Working Interests Share (Details) | 12 Months Ended
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Dec. 31, 2023 Boe Mcfe | Dec. 31, 2022 Boe Mcfe
Natural Gas and Natural Gas Liquids [Member] |  |
Net oil or gas produced (Thousand Cubic Foot Equivalent) | Mcfe | 8,976 | 14,891
Crude Oil and Natural Gas Liquids (NGL) [Member] |  |
Net oil or gas produced (Thousand Cubic Foot Equivalent) | Boe | 3,826 | 4,719

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- Definition Energy measure of oil and natural gas production reserves. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1204 -Subsection Instruction 5 -Publisher SEC + Details
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