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Note 1 - Organization and Accounting Policies - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Derivative liability - crude oil swaps | $ 12,547 | $ 4,806
Liabilities, Fair Value Disclosure, Total | 13,596 | 5,415
Fair Value, Inputs, Level 1 [Member] |  |
Liabilities, Fair Value Disclosure, Total | 0 |
Fair Value, Inputs, Level 2 [Member] |  |
Liabilities, Fair Value Disclosure, Total | 13,596 | 5,415
Fair Value, Inputs, Level 3 [Member] |  |
Liabilities, Fair Value Disclosure, Total | 0 |
Accrued Liabilities and Other [Member] |  |
SARs liability | 1,049 | 609
Derivative liability - crude oil swaps | 12,547 | 4,806
Accrued Liabilities and Other [Member] | Fair Value, Inputs, Level 1 [Member] |  |
SARs liability | 0 | 0
Derivative liability - crude oil swaps | 0 |
Accrued Liabilities and Other [Member] | Fair Value, Inputs, Level 2 [Member] |  |
SARs liability | 1,049 | 609
Derivative liability - crude oil swaps | 12,547 | 4,806
Accrued Liabilities and Other [Member] | Fair Value, Inputs, Level 3 [Member] |  |
SARs liability | 0 | $ 0
Derivative liability - crude oil swaps | $ 0 |

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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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