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Note 6 - Fair Value (Details Textual) $ / shares in Units, $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 USD ($) $ / shares | Mar. 31, 2022 USD ($) | Dec. 31, 2022
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net | $ 0 | $ 0 |
Unrealized Gain (Loss) on Investments | (7,537) | (2,237) |
Fair Value, Inputs, Level 3 [Member] | Debt [Member] |  |  |
Unrealized Gain (Loss) on Investments | (4,600) | (3,300) |
Fair Value, Inputs, Level 3 [Member] | Warrant [Member] |  |  |
Unrealized Gain (Loss) on Investments | (1,400) | $ 1,000 |
Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member] |  |  |
Unrealized Gain (Loss) on Investments | $ 200 |  |
The 2026 Notes [Member] |  |  |
Debt Instrument, Share Price (in dollars per share) | $ / shares | $ 23.39 |  |
The 2026 Notes [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Debt Instrument, Fair Value Disclosure | $ 53,800 |  |
The 2027 Notes [Member] |  |  |
Debt Instrument, Share Price (in dollars per share) | $ / shares | $ 24.00 |  |
The 2027 Notes [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Debt Instrument, Fair Value Disclosure | $ 55,200 |  |
Asset-backed Notes 2019 [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Debt Instrument, Fair Value Disclosure | 37,800 |  |
Asset-backed Notes 2022 [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Debt Instrument, Fair Value Disclosure | $ 100,000 |  |
Measurement Input, Hypothetical Market Yields [Member] |  |  |
Debt Instrument, Measurement Input |  |  | 0.25

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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482907/825-10-50-10 + Details
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