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Note 10 - Derivatives and Fair Value - Gain Loss on Derivative Instruments (Details) - Crude Oil Swaps [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Derivative instruments loss, net | $ (37,812) | $ (22,826) | $ 6,577
Cash Settlements Paid on Matured Derivative Contracts, Net [Member] |  |  |
Derivative instruments loss, net | (42,935) | (18,020) | 7,216
Unrealized Gain (Loss) [Member] |  |  |
Derivative instruments loss, net | $ 5,123 | $ (4,806) | $ (639)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
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