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Investments - Schedule of Reconciliation of Investments Measured at Fair value on a recurring basis using Level 3 inputs (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2023 | Mar. 31, 2022 | Jun. 30, 2022
Schedule Of Investment Income Reported Amounts By Category [Line Items] |  |  |  |  |
Investment Owned, at Fair Value, Beginning Balance |  |  | $ 233,683,986 |  |
Purchases (including PIK interest) | $ 11,109,646 | $ 27,063,262 | 39,636,459 | $ 113,857,030 |
Investment sales and repayments | 14,917,260 | 53,173,229 | 46,998,760 | 120,043,899 |
Amortization |  |  | 1,056,482 | 2,118,211 |
Net realized gains (losses) | (26,890,095) | (6,607,419) | (26,890,095) | (14,390,976) |
Net change in unrealized appreciation (depreciation) | 23,237,794 | 4,747,787 | 20,827,357 | 14,637,324 |
Investment Owned, at Fair Value, Ending Balance | 221,315,429 |  | 221,315,429 |  | $ 233,683,986
Senior Secured First Lien Debt Investments |  |  |  |  |
Schedule Of Investment Income Reported Amounts By Category [Line Items] |  |  |  |  |
Investment Owned, at Fair Value, Beginning Balance |  |  | 214,858,036 |  |
Investment Owned, at Fair Value, Ending Balance | 200,423,277 |  | 200,423,277 |  | 214,858,036
Equity, Warrants and Other Investments |  |  |  |  |
Schedule Of Investment Income Reported Amounts By Category [Line Items] |  |  |  |  |
Investment Owned, at Fair Value, Beginning Balance |  |  | 18,825,950 |  |
Investment Owned, at Fair Value, Ending Balance | 20,892,152 |  | 20,892,152 |  | 18,825,950
Fair Value, Inputs, Level 3 |  |  |  |  |
Schedule Of Investment Income Reported Amounts By Category [Line Items] |  |  |  |  |
Investment Owned, at Fair Value, Beginning Balance |  |  | 233,683,986 | 245,855,620 | 245,855,620
Purchases (including PIK interest) |  |  | 39,636,459 | 113,857,030 |
Investment sales and repayments |  |  | (46,998,760) | 120,043,899 |
Amortization |  |  | 1,056,482 | 2,118,211 |
Net realized gains (losses) |  |  | (26,890,095) | (14,390,976) |
Transfers in |  |  | 1,708,942 | 1,184,506 |
Transfers out |  |  | 1,708,942 | 1,184,506 |
Net change in unrealized appreciation (depreciation) |  |  | (20,827,357) | 14,637,324 |
Investment Owned, at Fair Value, Ending Balance | 221,315,429 | 242,033,310 | 221,315,429 | 242,033,310 | 233,683,986
Change in unrealized appreciation (depreciation) relating to assets |  |  | (5,929,219) | 2,053,948 |
Fair Value, Inputs, Level 3 | Senior Secured First Lien Debt Investments |  |  |  |  |
Schedule Of Investment Income Reported Amounts By Category [Line Items] |  |  |  |  |
Investment Owned, at Fair Value, Beginning Balance |  |  | 214,858,036 | 230,351,618 | 230,351,618
Purchases (including PIK interest) |  |  | 38,403,669 | 105,859,831 |
Investment sales and repayments |  |  | (46,998,760) | (111,873,208) |
Amortization |  |  | 1,056,482 | 2,054,336 |
Net realized gains (losses) |  |  | (9,515,487) | (11,576,316) |
Transfers out |  |  | (1,708,942) | (1,184,506) |
Net change in unrealized appreciation (depreciation) |  |  | 4,328,279 | 8,504,820 |
Investment Owned, at Fair Value, Ending Balance | 200,423,277 | 222,136,575 | 200,423,277 | 222,136,575 | 214,858,036
Change in unrealized appreciation (depreciation) relating to assets |  |  | (4,639,143) | (2,382,431) |
Fair Value, Inputs, Level 3 | Senior Secured Second Lien Debt Investments |  |  |  |  |
Schedule Of Investment Income Reported Amounts By Category [Line Items] |  |  |  |  |
Investment Owned, at Fair Value, Beginning Balance |  |  |  | 6,240,000 | 6,240,000
Investment sales and repayments |  |  |  | (8,000,000) |
Amortization |  |  |  | 63,875 |
Net realized gains (losses) |  |  | (17,374,608) |  |
Net change in unrealized appreciation (depreciation) |  |  | 17,374,608 | 1,696,125 |
Fair Value, Inputs, Level 3 | Equity, Warrants and Other Investments |  |  |  |  |
Schedule Of Investment Income Reported Amounts By Category [Line Items] |  |  |  |  |
Investment Owned, at Fair Value, Beginning Balance |  |  | 18,825,950 | 9,264,002 | 9,264,002
Purchases (including PIK interest) |  |  | 1,232,790 | 7,997,199 |
Investment sales and repayments |  |  |  | (170,691) |
Net realized gains (losses) |  |  |  | (2,814,660) |
Transfers in |  |  | 1,708,942 | 1,184,506 |
Net change in unrealized appreciation (depreciation) |  |  | (875,530) | 4,436,379 |
Investment Owned, at Fair Value, Ending Balance | $ 20,892,152 | $ 19,896,735 | 20,892,152 | 19,896,735 | $ 18,825,950
Change in unrealized appreciation (depreciation) relating to assets |  |  | $ (1,290,076) | $ 4,436,379 |

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