Note 3 - Investments (Tables)
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6 Months Ended |
Jun. 30, 2026 |
| Notes Tables |
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| Summary Investment Holdings [Table Text Block] |
| | | | | | | | | | | Percentage | |
| | | Amortized Cost | | | Fair Value | | | of Total Investments | |
| Senior secured term loans | | $ | 161,544,052 | | | $ | 128,864,890 | | | | 49.1 | % |
| Senior secured term loan participations | | | 88,994,091 | | | | 66,297,945 | | | | 25.2 | % |
| Senior secured trade finance participations | | | 32,328,967 | | | | 24,859,079 | | | | 9.5 | % |
| Convertible notes | | | 29,335,457 | | | | 30,806,874 | | | | 11.7 | % |
| Other investments | | | 21,575,474 | | | | 11,816,853 | | | | 4.5 | % |
| Equity warrants | | | — | | | | — | | | | 0.0 | % |
| Total investments | | $ | 333,778,041 | | | | 262,645,641 | | | | 100.0 | % |
| | | | | | | | | | | Percentage | |
| | | Amortized Cost | | | Fair Value | | | of Total Investments | |
| Senior secured term loans | | $ | 154,210,608 | | | $ | 123,807,284 | | | | 47.2 | % |
| Senior secured term loan participations | | | 93,914,525 | | | | 71,371,727 | | | | 27.2 | % |
| Senior secured trade finance participations | | | 32,007,959 | | | | 26,493,018 | | | | 10.1 | % |
| Convertible notes | | | 27,621,053 | | | | 29,092,471 | | | | 11.1 | % |
| Other investments | | | 21,849,620 | | | | 11,451,817 | | | | 4.4 | % |
| Equity warrants | | | — | | | | — | | | | 0.0 | % |
| Total investments | | $ | 329,603,765 | | | $ | 262,216,317 | | | | 100.0 | % |
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| Summary Investment Holdings, Asset Management Arrangement [Table Text Block] |
| | | As of June 30, 2026 | | | As of December 31, 2025 | |
| | | Fair | | | Percentage | | | Fair | | | Percentage | |
| Sub-advisor | | Value | | | of Total | | | Value | | | of Total | |
| CEECAT Capital Limited & CCL Investments SARL | | $ | — | | | | 0.0 | % | | $ | 11,036,073 | | | | 4.0 | % |
| Origin Capital Limited | | | 16,135,533 | | | | 5.9 | % | | | 15,891,748 | | | | 5.8 | % |
| Scipion Capital, Ltd. | | | 1,777,308 | | | | 0.7 | % | | | 1,777,308 | | | | 0.7 | % |
| TRG Management LP | | | 35,587,821 | | | | 13.1 | % | | | 34,613,423 | | | | 12.7 | % |
| Total | | $ | 53,500,662 | | | | 19.7 | % | | $ | 63,318,552 | | | | 23.2 | % |
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| Investment Holdings, Schedule of Investments [Table Text Block] |
| | | As of June 30, 2026 | | | As of December 31, 2025 | |
| | | Fair | | | Percentage | | | Fair | | | Percentage | |
| Industry | | Value | | | of Total | | | Value | | | of Total | |
| Beef Cattle, Except Feedlots | | $ | 2,955,774 | | | | 1.1 | % | | $ | 2,955,774 | | | | 1.1 | % |
| Boatbuilding and Repairing | | | 4,780,946 | | | | 1.8 | % | | | 5,520,952 | | | | 2.1 | % |
| Chemicals and Allied Products | | | 3,919,175 | | | | 1.5 | % | | | 4,019,175 | | | | 1.5 | % |
| Chocolate and Cocoa Products | | | 23,514,307 | | | | 9.0 | % | | | 26,475,443 | | | | 10.1 | % |
| Coal and Other Minerals and Ores | | | 33,234,222 | | | | 12.7 | % | | | 33,577,527 | | | | 12.8 | % |
| Computer Related Services | | | 30,806,874 | | | | 11.7 | % | | | 29,092,471 | | | | 11.1 | % |
| Corn | | | 13,408,445 | | | | 5.1 | % | | | 13,371,613 | | | | 5.1 | % |
| Corrugated and Solid Fiber Boxes | | | 2,727,088 | | | | 1.0 | % | | | 2,520,135 | | | | 1.0 | % |
| Cotton Ginning | | | 1,792,698 | | | | 0.7 | % | | | 1,792,698 | | | | 0.7 | % |
| Dairy Farms | | | 3,919,677 | | | | 1.5 | % | | | 4,252,363 | | | | 1.6 | % |
| Electric Services | | | 1,403,608 | | | | 0.5 | % | | | 764,426 | | | | 0.3 | % |
| Freight Transportation Arrangement | | | 3,099,538 | | | | 1.2 | % | | | 3,099,538 | | | | 1.2 | % |
| Frozen Fish and Seafood | | | 2,390,516 | | | | 0.9 | % | | | 2,674,069 | | | | 1.0 | % |
| Hotels and Motels | | | 7,728,053 | | | | 2.9 | % | | | 9,885,644 | | | | 3.8 | % |
| Land Subdividers and Developers | | | 18,473,849 | | | | 7.0 | % | | | 18,029,698 | | | | 6.9 | % |
| Motor Vehicle Parts and Accessories | | | 9,987,459 | | | | 3.8 | % | | | 11,036,073 | | | | 4.2 | % |
| Refuse Systems | | | 78,074,055 | | | | 29.7 | % | | | 70,740,611 | | | | 26.9 | % |
| Retail Bakeries | | | 6,521,990 | | | | 2.5 | % | | | 6,982,214 | | | | 2.7 | % |
| Short-Term Business Credit | | | 1,777,308 | | | | 0.7 | % | | | 1,777,308 | | | | 0.7 | % |
| Soybeans | | | 5,944,929 | | | | 2.3 | % | | | 6,040,979 | | | | 2.3 | % |
| Towing and Tugboat Service | | | 520,357 | | | | 0.2 | % | | | 1,668,687 | | | | 0.6 | % |
| Other | | | 5,664,773 | | | | 2.2 | % | | | 5,938,919 | | | | 2.3 | % |
| Total | | $ | 262,645,641 | | | | 100.0 | % | | $ | 262,216,317 | | | | 100.0 | % |
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| Summary of Investment Holdings, Schedule of Investments [Table Text Block] |
| | | As of June 30, 2026 | | | As of December 31, 2025 | |
| | | Fair | | | Percentage | | | Fair | | | Percentage | |
| Country | | Value | | | of Total | | | Value | | | of Total | |
| Argentina (1) | | $ | 14,613,078 | | | | 5.7 | % | | $ | 15,041,814 | | | | 5.7 | % |
| Botswana | | | 1,777,308 | | | | 0.7 | % | | | 1,777,308 | | | | 0.7 | % |
| Brazil | | | 35,690,835 | | | | 13.6 | % | | | 34,916,438 | | | | 13.3 | % |
| Cabo Verde | | | 7,728,053 | | | | 2.9 | % | | | 9,885,644 | | | | 3.8 | % |
| Cameroon | | | 12,603,957 | | | | 4.8 | % | | | 13,525,607 | | | | 5.2 | % |
| Chile | | | 1,403,608 | | | | 0.5 | % | | | 764,426 | | | | 0.3 | % |
| Ecuador | | | 5,117,604 | | | | 1.9 | % | | | 5,194,204 | | | | 2.0 | % |
| Hong Kong | | | 14,208,553 | | | | 5.4 | % | | | 14,551,857 | | | | 5.5 | % |
| Indonesia | | | 10,910,350 | | | | 4.2 | % | | | 12,949,836 | | | | 4.9 | % |
| Kenya | | | 3,099,538 | | | | 1.2 | % | | | 3,099,538 | | | | 1.2 | % |
| Malaysia | | | 3,919,175 | | | | 1.5 | % | | | 4,019,175 | | | | 1.5 | % |
| Mexico | | | 78,074,055 | | | | 29.7 | % | | | 70,740,611 | | | | 26.9 | % |
| Namibia | | | 18,473,849 | | | | 7.0 | % | | | 18,029,698 | | | | 6.9 | % |
| Netherlands | | | 9,987,459 | | | | 3.8 | % | | | 11,036,073 | | | | 4.2 | % |
| Nigeria | | | 1,696,509 | | | | 0.6 | % | | | 2,918,985 | | | | 1.1 | % |
| Peru | | | 1,261,346 | | | | 0.5 | % | | | 1,261,346 | | | | 0.5 | % |
| Romania | | | 6,521,990 | | | | 2.5 | % | | | 6,982,214 | | | | 2.7 | % |
| Singapore | | | 19,025,669 | | | | 7.2 | % | | | 19,025,670 | | | | 7.3 | % |
| Uganda | | | 13,408,445 | | | | 5.1 | % | | | 13,371,613 | | | | 5.1 | % |
| N/A | | | 3,124,260 | | | | 1.2 | % | | | 3,124,260 | | | | 1.2 | % |
| Total | | $ | 262,645,641 | | | | 100.0 | % | | $ | 262,216,317 | | | | 100.0 | % |
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