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Note 6 - Fair Value - Reconciliation of Level 3 Assets Measured on a Recurring Basis (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Balance | $ 691,426 | $ 687,397 | $ 641,340 | $ 695,465
Purchase of investments | 72,762 | 42,369 | 162,766 | 116,058
Warrants received and classified as Level 3 | 247 | 117 | 618 | 282
Principal payments received on investments | (47,123) | (78,493) | (85,171) | (129,238)
PIK interest on investments | 1,566 | 243 | 2,844 | 528
Proceeds from sale of investments | (1,904) | (783) | (2,008) | (784)
Net realized gain (loss) on investments | (6,122) | (9,294) | (6,283) | (9,293)
Unrealized (depreciation) appreciation included in earnings | (38,638) | (21,658) | (41,063) | (53,545)
Transfer out of Level 3 | (89) | 0 | (89) |
Transfer out of warrant and equity investments | 0 | 0 | 0 | 0
Other | (94) | 1,092 | (923) | 1,517
Balance | 672,031 | 620,990 | 672,031 | 620,990
Warrants and equity received and classified as Level 3 | 247 | 117 | 618 | 282
Debt [Member] |  |  |  |
Balance | 645,629 | 643,567 | 596,025 | 638,779
Purchase of investments | 72,762 | 42,225 | 162,766 | 113,854
Warrants received and classified as Level 3 |  | 0 | 0 | 0
Principal payments received on investments | (46,859) | (78,493) | (84,749) | (129,238)
PIK interest on investments | 1,566 | 243 | 2,844 | 528
Proceeds from sale of investments | (1) | (1) | (1) | (2)
Net realized gain (loss) on investments | 1 | (9,364) | 2 | (9,363)
Unrealized (depreciation) appreciation included in earnings | (25,005) | (18,005) | (27,965) | (34,811)
Transfer out of Level 3 | 0 |  | 0 |
Transfer out of warrant and equity investments | 0 | (2,093) | 0 | (2,093)
Other | (94) | 1,092 | (923) | 1,517
Balance | 647,999 | 579,171 | 647,999 | 579,171
Warrants and equity received and classified as Level 3 |  | 0 | 0 | 0
Warrant [Member] |  |  |  |
Balance | 14,994 | 17,159 | 14,732 | 16,438
Purchase of investments | 0 | 0 | 0 | 0
Warrants received and classified as Level 3 | 247 | 117 | 618 | 282
Principal payments received on investments | 0 | 0 | 0 | 0
PIK interest on investments | 0 | 0 | 0 | 0
Proceeds from sale of investments | (1,229) | (579) | (1,230) | (579)
Net realized gain (loss) on investments | 955 | (99) | 690 | (99)
Unrealized (depreciation) appreciation included in earnings | (431) | 3,858 | (274) | 4,414
Transfer out of Level 3 | (89) |  | (89) |
Transfer out of warrant and equity investments | (334) | 0 | (334) | 0
Other | 0 | 0 | 0 | 0
Balance | 14,113 | 20,456 | 14,113 | 20,456
Warrants and equity received and classified as Level 3 | 247 | 117 | 618 | 282
Equity Securities [Member] |  |  |  |
Balance | 27,139 | 12,974 | 27,139 | 25,611
Purchase of investments | 0 | 144 | 0 | 2,189
Warrants received and classified as Level 3 | 0 | 0 | 0 | 0
Principal payments received on investments | 0 | 0 | 0 | 0
PIK interest on investments | 0 | 0 | 0 | 0
Proceeds from sale of investments | (622) | (203) | (641) | (203)
Net realized gain (loss) on investments | 200 | 169 | 219 | 169
Unrealized (depreciation) appreciation included in earnings | (20,712) | (172) | (20,712) | (14,854)
Transfer out of Level 3 | 0 |  | 0 |
Transfer out of warrant and equity investments | (123) | 0 | (123) | 0
Other | 0 | 0 | 0 | 0
Balance | 5,882 | 12,912 | 5,882 | 12,912
Warrants and equity received and classified as Level 3 | 0 | 0 | 0 | 0
Other Investment [Member] |  |  |  |
Balance | 3,664 | 13,697 | 3,444 | 14,637
Purchase of investments | 0 | 0 | 0 | 15
Warrants received and classified as Level 3 | 0 | 0 | 0 | 0
Principal payments received on investments | (264) | 0 | (422) | 0
PIK interest on investments | 0 | 0 | 0 | 0
Proceeds from sale of investments | (52) | 0 | (136) | 0
Net realized gain (loss) on investments | (7,278) | 0 | (7,194) | 0
Unrealized (depreciation) appreciation included in earnings | 7,510 | (7,339) | 7,888 | (8,294)
Transfer out of Level 3 | 0 |  | 0 |
Transfer out of warrant and equity investments | 457 | 2,093 | 457 | 2,093
Other | 0 | 0 | 0 | 0
Balance | 4,037 | 8,451 | 4,037 | 8,451
Warrants and equity received and classified as Level 3 | $ 0 | $ 0 | $ 0 | $ 0

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