CONSOLIDATED STATEMENTS OF CHANGES IN NET ASSETS - USD ($)	3 Months Ended				6 Months Ended		12 Months Ended		138 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2023
Investment Company, Changes in Net Assets [Line Items]
Beginning balance	$ 280,852,045	$ 275,776,613	$ 285,036,401	$ 285,111,233	$ 275,776,613	$ 285,111,233	$ 285,111,233
Beginning balance (shares)		19,666,769			19,666,769
Net investment income	10,413,244	$ 9,067,620	6,174,571	5,514,183
Net realized gain on non-controlled, non-affiliated investments	(310,588)	34,967	(352,723)	3,458,090	$ (275,621)	3,105,367
Net realized loss on foreign currency translation	(10,704)	(39,912)		(7,350)
Net change in unrealized depreciation on non-controlled, non-affiliated investments	(6,295,233)	(4,249,642)	(4,289,591)	(3,721,602)
Net change in unrealized appreciation on foreign currency translations	(20,323)	1,874	(35,754)
Provision for taxes on unrealized appreciation on investments	(65,353)	(78,760)	(160,656)	(21,157)
Distributions from net investment income	(8,659,144)	(7,951,284)	(6,643,663)	(5,464,666)
Issuance of common stock, net of offering costs	$ 32,421,084	$ 8,290,569	137,533	167,670
Issuance of common stock, net of offering costs (shares)	2,309,521	581,614					149,174	31,592	22,557,904
Ending balance	$ 308,325,028	$ 280,852,045	279,866,118	285,036,401	$ 308,325,028	279,866,118	$ 275,776,613	$ 285,111,233	$ 308,325,028
Ending balance (shares)	22,557,904				22,557,904		19,666,769		22,557,904
Common Stock
Investment Company, Changes in Net Assets [Line Items]
Beginning balance	$ 20,248	$ 19,667	$ 19,533	$ 19,518	$ 19,667	$ 19,518	$ 19,518
Beginning balance (shares)	20,248,383	19,666,769	19,532,519	19,517,595	19,666,769	19,517,595	19,517,595
Issuance of common stock, net of offering costs	$ 2,310	$ 581	$ 13	$ 15
Issuance of common stock, net of offering costs (shares)	2,309,521	581,614	13,416	14,924
Ending balance	$ 22,558	$ 20,248	$ 19,546	$ 19,533	$ 22,558	$ 19,546	$ 19,667	$ 19,518	$ 22,558
Ending balance (shares)	22,557,904	20,248,383	19,545,935	19,532,519	22,557,904	19,545,935	19,666,769	19,517,595	22,557,904
Paid-in capital
Investment Company, Changes in Net Assets [Line Items]
Beginning balance	$ 283,404,708	$ 275,114,720	$ 274,726,776	$ 274,559,121	$ 275,114,720	$ 274,559,121	$ 274,559,121
Issuance of common stock, net of offering costs	32,418,774	8,289,988	137,520	167,655
Ending balance	315,823,482	283,404,708	274,864,296	274,726,776	315,823,482	274,864,296	275,114,720	$ 274,559,121	$ 315,823,482
Accumulated undistributed surplus (deficit)
Investment Company, Changes in Net Assets [Line Items]
Beginning balance	(2,572,911)	642,226	10,290,092	10,532,594	642,226	10,532,594	10,532,594
Net investment income	10,413,244	9,067,620	6,174,571	5,514,183
Net realized gain on non-controlled, non-affiliated investments	(310,588)	34,967	(352,723)	3,458,090
Net realized loss on foreign currency translation	(10,704)	(39,912)		(7,350)
Net change in unrealized depreciation on non-controlled, non-affiliated investments	(6,295,233)	(4,249,642)	(4,289,591)	(3,721,602)
Net change in unrealized appreciation on foreign currency translations	(20,323)	1,874	(35,754)
Provision for taxes on unrealized appreciation on investments	(65,353)	(78,760)	(160,656)	(21,157)
Distributions from net investment income	(8,659,144)	(7,951,284)	(6,643,663)	(5,464,666)
Ending balance	$ (7,521,012)	$ (2,572,911)	$ 4,982,276	$ 10,290,092	$ (7,521,012)	$ 4,982,276	$ 642,226	$ 10,532,594	$ (7,521,012)