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Selected Quarterly Financial Data (unaudited) - Quarterly Financial Data (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019
Selected Quarterly Financial Information [Abstract] |  |  |  |  |  |  |
Total Investment Income |  | $ 23,878,302 | $ 26,684,153 | $ 24,431,365 |  |  |
Total Investment Income per Common Share | [1] | $ 0.46 | $ 0.65 | $ 0.62 | $ 0.65 | $ 1.03 |
Net investment income |  | $ 6,591,090 | $ 9,428,066 | $ 8,923,944 |  |  |
Net Investment Income Limited Partnership Per Unit Basic |  | $ 0.46 | $ 0.66 | $ 0.62 |  |  |
Net Investment Income Limited Partnership Per Unit Diluted |  | $ 0.46 | $ 0.66 | $ 0.62 |  |  |
Net Realized and Unrealized Gain (Loss) |  | $ (10,683,560) | $ (6,193,563) | $ (6,337,314) |  |  |
Net Realized and Unrealized Gain (Loss) per Common Share | [1] | $ (0.74) | $ (0.43) | $ (0.44) | (0.82) | (2.82) |
Net Income (Loss) |  | $ (4,092,470) | $ 3,234,503 | $ 2,586,630 |  |  |
Earnings per Common Share - Basic |  | $ (0.28) | $ 0.22 | $ 0.18 |  |  |
Earnings per Common Share - Diluted |  | (0.28) | 0.22 | 0.18 |  |  |
Net Asset Value per Common Share at End of Quarter | [1] | $ 5.21 | $ 6.09 | $ 6.5 | $ 6.92 | $ 7.79 | $ 10.51
[1] | All per share data activity is calculated based on the weighted average shares outstanding for the relevant period, except net increase (decrease) in net assets from capital share transactions, which is based on the common shares outstanding as of the relevant balance sheet date.

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