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Note 7 - Borrowings - Borrowings (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023 | Nov. 09, 2022 | Jun. 15, 2022 | Mar. 30, 2021
--- | --- | --- | --- | --- | ---
Total commitment | $ 705,970 | $ 615,000 |  |  |
Balance outstanding | 436,970 | 466,000 |  |  |
Unused commitment | 269,000 | 149,000 |  |  |
Unamortized debt issuance costs attributable to term borrowings | (3,001) | (3,765) |  |  |
Total borrowings outstanding, net | 433,969 | 462,235 |  |  |
Key Facility [Member] |  |  |  |  |
Total commitment | 150,000 | 150,000 |  |  |
Balance outstanding | 0 | 70,000 |  |  |
Unused commitment | 150,000 | 80,000 |  |  |
NYL Facility [Member] |  |  |  |  |
Total commitment | 250,000 | 250,000 |  |  |
Balance outstanding | 181,000 | 181,000 |  |  |
Unused commitment | 69,000 | 69,000 |  |  |
Nuveen Facility [Member] |  |  |  |  |
Total commitment | 100,000 | 0 |  |  |
Balance outstanding | 50,000 | 0 |  |  |
Unused commitment | 50,000 | 0 |  |  |
Asset-backed Notes 2022 [Member] |  |  |  |  |
Total commitment | 90,970 | 100,000 | $ 157,800 |  |
Balance outstanding | 90,970 | 100,000 |  |  |
Unused commitment | 0 | 0 |  |  |
The 2027 Notes [Member] |  |  |  |  |
Total commitment | 57,500 | 57,500 |  | $ 50,000 |
Balance outstanding | 57,500 | 57,500 |  |  |
Unused commitment | 0 | 0 |  |  |
The 2026 Notes [Member] |  |  |  |  |
Total commitment | 57,500 | 57,500 |  |  | $ 57,500
Balance outstanding | 57,500 | 57,500 |  |  |
Unused commitment | $ 0 | $ 0 |  |  |

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