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Note 5 - Transactions With Affiliated Companies | 3 Months Ended
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Mar. 31, 2023
Notes to Financial Statements |
Investments in and Advances to Affiliates, Schedule of Investments [Text Block] | Note 5. Transactions with affiliated companies A non-controlled affiliated company is generally a portfolio company in which the Company owns 5% or more of such portfolio company’s voting securities but not more than 25% of such portfolio company’s voting securities. Transactions related to investments in non-controlled affiliated companies for the three months ended March 31, 2023 were as follows:
|  |  |  |  |  |  |  |  |  | Three months ended March 31, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Fair value at |  |  |  |  |  |  |  |  |  |  | Transfers |  |  |  |  |  |  | Net |  |  |  |  |  |  | Fair value at |  |  |  |  |
Portfolio |  | December 31, |  |  |  |  |  |  | Principal |  |  | in/(out) at |  |  | Discount |  |  | unrealized |  |  | Net realized |  |  | March 31, |  |  | Interest |
Company |  | 2022 |  |  | Purchases |  |  | Payments |  |  | fair value |  |  | accretion |  |  | gain/(loss) |  |  | gain/(loss) |  |  | 2023 |  |  | income |
|  | (In thousands) |
Cadrenal Therapeutics, Inc. |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 846 |  |  | $ | — |  |  | $ | 846 |  |  | $ | — |
Total non-controlled affiliates |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 846 |  |  | $ | — |  |  | $ | 846 |  |  | $ | — |
For the three months ended March 31, 2022, there were no transactions related to investments in non-controlled affiliated companies. A controlled affiliated company is generally a portfolio company in which the Company owns more than 25% of such portfolio company’s voting securities or has the power to exercise control over management or policies of such portfolio company (including through a management agreement). For the three months ended March 31, 2023, there were no transactions related to investments in controlled affiliated companies. Transactions related to investments in controlled affiliated companies for the three months ended March 31, 2022 were as follows:
|  |  |  |  |  |  |  |  |  | Three months ended March 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Fair value at |  |  |  |  |  |  |  |  |  |  | Transfers |  |  |  |  |  |  | Net |  |  |  |  |  |  | Fair value at |  |  |  |  |
Portfolio |  | December 31, |  |  |  |  |  |  |  |  |  |  | in/(out) at |  |  | Dividends |  |  | unrealized |  |  | Net realized |  |  | March 31, |  |  | Dividend |
Company |  | 2021 |  |  | Purchases |  |  | Sales |  |  | fair value |  |  | declared |  |  | gain/(loss) |  |  | gain/(loss) |  |  | 2022 |  |  | income |
|  | (In thousands) |
HESP LLC |  |  | — |  |  |  | — |  |  |  | (50 | ) |  |  | — |  |  |  | — |  |  |  | 50 |  |  |  | — |  |  |  | — |  |  |  | — |
Total controlled affiliates |  | $ | — |  |  | $ | — |  |  | $ | (50 | ) |  | $ | — |  |  | $ | — |  |  | $ | 50 |  |  | $ | — |  |  | $ | — |  |  | $ | — |

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