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Note 1 - Description of Operations and Significant Accounting Policies (Details Textual) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
--- | --- | --- | ---
Oil, Productive Well, Number of Wells, Net | 952 |  |
Deferred Tax Assets, Valuation Allowance |  | $ 0 | $ 0
Minimum [Member] |  |  |
Oil, Productive Well, Number of Wells, Gross | 534 |  |
Property, Plant and Equipment, Useful Life | 5 years |  |
Maximum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 10 years |  |

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- Definition Number of producing oil wells and oil wells capable of production with working interest ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1208 -Paragraph (a) -Publisher SEC + Details
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- Definition Number of producing oil wells and oil wells capable of production representing summation of fractional ownership working interest to whole. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1208 -Paragraph (a) -Publisher SEC + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-2 + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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