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Note 8 - Asset Retirement Obligations (Details Textual) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 12 Months Ended
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Jul. 27, 2022 | May 03, 2022 | Jan. 05, 2022 | Dec. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Asset Retirement Obligation, Liabilities Incurred |  |  |  |  | $ 11 | $ 11,811
Asset Retirement Obligations, Relief Through Disposals |  |  |  | $ 500 | $ 500 | $ 200
January 2022 Acquisition [Member] |  |  |  |  |  |
Asset Retirement Obligation, Liabilities Incurred |  |  | $ 9,600 |  |  |
Liberty County, Texas Acquisition [Member] |  |  |  |  |  |
Asset Retirement Obligation, Liabilities Incurred |  | $ 500 |  |  |  |
East Texas Acquisition [Member] |  |  |  |  |  |
Asset Retirement Obligation, Liabilities Incurred | $ 1,700 |  |  |  |  |

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- Definition Amount of asset retirement obligations incurred during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481850/410-20-50-1 + Details
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- Definition Amount of decrease in asset retirement obligations through disposals. + References No definition available. + Details
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