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Note 7 - Borrowings - Borrowings (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022 | Nov. 09, 2022 | Jun. 15, 2022 | Mar. 30, 2021 | Aug. 13, 2019
--- | --- | --- | --- | --- | --- | ---
Total commitment | $ 577,791 | $ 582,573 |  |  |  |
Balance outstanding | 444,541 | 439,323 |  |  |  |
Unused commitment | 133,250 | 143,250 |  |  |  |
Unamortized debt issuance costs attributable to term borrowings | (4,896) | (5,245) |  |  |  |
Total borrowings outstanding, net | 439,645 | 434,078 |  |  |  |
Key Facility [Member] |  |  |  |  |  |
Total commitment | 125,000 | 125,000 |  |  |  |
Balance outstanding | 15,000 | 5,000 |  |  |  |
Unused commitment | 110,000 | 120,000 |  |  |  |
NYL Facility [Member] |  |  |  |  |  |
Total commitment | 200,000 | 200,000 |  |  |  |
Balance outstanding | 176,750 | 176,750 |  |  |  |
Unused commitment | 23,250 | 23,250 |  |  |  |
Asset-backed Notes 2019 [Member] |  |  |  |  |  |
Total commitment | 37,791 | 42,573 |  |  |  | $ 160,000
Balance outstanding | 37,791 | 42,573 |  |  |  |
Unused commitment | 0 | 0 |  |  |  |
Asset-backed Notes 2022 [Member] |  |  |  |  |  |
Total commitment | 100,000 | 100,000 | $ 157,800 |  |  |
Balance outstanding | 100,000 | 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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