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Note 17 - Supplemental Oil and Natural Gas Information (Unaudited) (Details Textual) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($) $ / Boe | Dec. 31, 2022 USD ($) $ / Boe
Capitalized Costs, Asset Retirement Costs |  | $ 3,100 | $ 2,100
Capitalized Costs, Mineral Interests in Unproved Properties | [1] | 0 | 1,584
Impairment of Oil and Gas Properties |  | 26,680 | 0
Depreciation, Depletion and Amortization |  | $ 11,235 | 9,607
Oil and Gas Property, Ceiling Test, Discount Rate |  | 10.00% |
Oil and Gas Properties [Member] |  |  |
Depreciation, Depletion and Amortization |  | $ 9,800 | $ 8,500
Oil and Gas Properties, Depletion and Amortization per Unit of Production (in USD per Barrel of Oil Equivalent) | $ / Boe |  | 15.66 | 13.75
[1] | Unevaluated oil and natural gas properties consist of leasehold costs that are excluded from the depletion, depreciation and amortization calculation and the ceiling test until a determination about the existence of proved reserves can be completed. Unevaluated oil and natural gas properties consisted of unproved lease acquisition costs and costs paid to evaluate potential acquisition prospects of $1.6 million at December 31, 2022. On a quarterly basis, management reviews market conditions and other changes in circumstances related to the Company’s unevaluated properties and transfers the costs to evaluated properties within the full cost pool as warranted. During 2023, the unevaluated property balance was transferred to evaluated properties due to the Company evaluating its use of capital relative to its portfolio and strategic initiatives and determining that it no longer plans to fund development of its unevaluated acreage.

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- Definition The amount of asset retirement costs previously incurred and capitalized separately from the capitalized amount of the associated long-lived assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-13 + Details
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- Definition Capitalized costs of unproven properties that include fee ownership or a lease, concession, or other interest representing the right to extract oil or gas subject to such terms as may be imposed by the conveyance of that interest. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 932 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//932/tableOfContent Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-13 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-14 + Details
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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 + Details
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- Definition The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section 35 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482450/932-360-35-11 + Details
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