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Note 2 - Summary of Significant Accounting Policies - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Assets, Fair Value Disclosure, Total | $ 102 |
Liabilities, Fair Value Disclosure, Total | 556 | $ 5,415
Prepayments and Other [Member] |  |
Derivative asset | 102 |
Accrued Liabilities [Member] |  |
SARs liability | 556 | 609
Derivative liability |  | 4,806
Fair Value, Inputs, Level 1 [Member] |  |
Assets, Fair Value Disclosure, Total | 0 |
Liabilities, Fair Value Disclosure, Total | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Prepayments and Other [Member] |  |
Derivative asset | 0 |
Fair Value, Inputs, Level 1 [Member] | Accrued Liabilities [Member] |  |
SARs liability | 0 | 0
Derivative liability |  | 0
Fair Value, Inputs, Level 2 [Member] |  |
Assets, Fair Value Disclosure, Total | 102 |
Liabilities, Fair Value Disclosure, Total | 556 | 5,415
Fair Value, Inputs, Level 2 [Member] | Prepayments and Other [Member] |  |
Derivative asset | 102 |
Fair Value, Inputs, Level 2 [Member] | Accrued Liabilities [Member] |  |
SARs liability | 556 | 609
Derivative liability |  | 4,806
Fair Value, Inputs, Level 3 [Member] |  |
Assets, Fair Value Disclosure, Total | 0 |
Liabilities, Fair Value Disclosure, Total | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Prepayments and Other [Member] |  |
Derivative asset | 0 |
Fair Value, Inputs, Level 3 [Member] | Accrued Liabilities [Member] |  |
SARs liability | $ 0 | 0
Derivative liability |  | $ 0

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other 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. 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 55 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 Reference 4: 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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- 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. Includes liabilities 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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 + Details
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