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Note 6 - Fair Value - Significant Level 3 Fair Value Measurment Inputs (Details) - Fair Value, Inputs, Level 3 [Member] $ in Thousands | Sep. 30, 2022 USD ($) | Dec. 31, 2021 USD ($)
--- | --- | ---
Investments, fair value | $ 634,259 | $ 457,557
Debt [Member] | Valuation Technique, Discounted Cash Flow [Member] |  |
Investments, fair value | $ 605,719 | $ 430,417
Debt [Member] | Valuation Technique, Discounted Cash Flow [Member] | Minimum [Member] | Hypothetical Market Yield [Member] |  |
Investments, measurement input | 0.03 |
Debt [Member] | Valuation Technique, Discounted Cash Flow [Member] | Maximum [Member] | Hypothetical Market Yield [Member] |  |
Investments, measurement input | 0.25 |
Debt [Member] | Valuation Technique, Discounted Cash Flow [Member] | Weighted Average [Member] | Hypothetical Market Yield [Member] |  |
Investments, measurement input | 0.14 | 12
Debt [Member] | Multiple Probability Weighted Cash Flow Model [Member] |  |
Investments, fair value | $ 3,313 | $ 6,900
Debt [Member] | Multiple Probability Weighted Cash Flow Model [Member] | Probability Weighting [Member] |  |
Investments, measurement input | 0.25 |
Debt [Member] | Multiple Probability Weighted Cash Flow Model [Member] | Minimum [Member] | Probability Weighting [Member] |  |
Investments, measurement input |  | 20
Debt [Member] | Multiple Probability Weighted Cash Flow Model [Member] | Maximum [Member] | Probability Weighting [Member] |  |
Investments, measurement input |  | 50
Debt [Member] | Multiple Probability Weighted Cash Flow Model [Member] | Weighted Average [Member] | Probability Weighting [Member] |  |
Investments, measurement input | 0.25 | 33
Warrant [Member] | Black-scholes Valuation Model [Member] |  |
Investments, fair value | $ 21,894 | $ 19,837
Warrant [Member] | Black-scholes Valuation Model [Member] | Measurement Input, Price Volatility [Member] |  |
Investments, measurement input | 0.25 | 25
Warrant [Member] | Black-scholes Valuation Model [Member] | Measurement Input, Discount for Lack of Marketability [Member] |  |
Investments, measurement input | 0.20 | 20
Warrant [Member] | Black-scholes Valuation Model [Member] | Minimum [Member] | Measurement Input, Share Price [Member] |  |
Investments, measurement input | 0.00 | 0.00
Warrant [Member] | Black-scholes Valuation Model [Member] | Minimum [Member] | Estimated Time to Exit [Member] |  |
Investments, measurement input | 1 | 1
Warrant [Member] | Black-scholes Valuation Model [Member] | Maximum [Member] | Measurement Input, Share Price [Member] |  |
Investments, measurement input | 1,899 | 980.00
Warrant [Member] | Black-scholes Valuation Model [Member] | Maximum [Member] | Estimated Time to Exit [Member] |  |
Investments, measurement input | 4 | 4
Warrant [Member] | Black-scholes Valuation Model [Member] | Weighted Average [Member] | Measurement Input, Share Price [Member] |  |
Investments, measurement input | 64.53 | 20.35
Warrant [Member] | Black-scholes Valuation Model [Member] | Weighted Average [Member] | Measurement Input, Price Volatility [Member] |  |
Investments, measurement input | 0.25 | 25
Warrant [Member] | Black-scholes Valuation Model [Member] | Weighted Average [Member] | Measurement Input, Discount for Lack of Marketability [Member] |  |
Investments, measurement input | 0.20 | 20
Warrant [Member] | Black-scholes Valuation Model [Member] | Weighted Average [Member] | Estimated Time to Exit [Member] |  |
Investments, measurement input | 2 | 2
Other Investments [Member] | Multiple Probability Weighted Cash Flow Model [Member] |  |
Investments, fair value | $ 1,300 | $ 200
Other Investments [Member] | Multiple Probability Weighted Cash Flow Model [Member] | Probability Weighting [Member] |  |
Investments, measurement input | 1 |
Other Investments [Member] | Multiple Probability Weighted Cash Flow Model [Member] | Measurement Input, Discount Rate [Member] |  |
Investments, measurement input | 0.25 | 25
Other Investments [Member] | Multiple Probability Weighted Cash Flow Model [Member] | Weighted Average [Member] | Probability Weighting [Member] |  |
Investments, measurement input | 1 | 100
Other Investments [Member] | Multiple Probability Weighted Cash Flow Model [Member] | Weighted Average [Member] | Measurement Input, Discount Rate [Member] |  |
Investments, measurement input | 0.25 | 25
Equity Securities [Member] | Last Equity Financing [Member] |  |
Investments, fair value | $ 2,033 | $ 203
Equity Securities [Member] | Last Equity Financing [Member] | Minimum [Member] | Measurement Input, Share Price [Member] |  |
Investments, measurement input | 1.00 | 0.00
Equity Securities [Member] | Last Equity Financing [Member] | Maximum [Member] | Measurement Input, Share Price [Member] |  |
Investments, measurement input | 215.03 | 1.00
Equity Securities [Member] | Last Equity Financing [Member] | Weighted Average [Member] | Measurement Input, Share Price [Member] |  |
Investments, measurement input | 30.09 | 0.41

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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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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