PORTFOLIO INVESTMENTS AND FAIR VALUE - Geographical Concentration of Investment Portfolio (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Investment Holdings [Line Items]
Investments, amortized cost	$ 912,581,782	$ 875,823,177
Fair value of investments	$ 877,493,781	$ 844,733,638
% of Total Investments at fair value	100.00%	100.00%
California
Investment Holdings [Line Items]
Investments, amortized cost	$ 179,822,505	$ 167,833,384
Fair value of investments	$ 177,328,495	$ 165,340,017
% of Total Investments at fair value	20.21%	19.57%
Texas
Investment Holdings [Line Items]
Investments, amortized cost	$ 191,169,751	$ 191,422,143
Fair value of investments	$ 169,192,709	$ 171,165,597
% of Total Investments at fair value	19.28%	20.26%
Florida
Investment Holdings [Line Items]
Investments, amortized cost	$ 70,928,731	$ 60,593,839
Fair value of investments	$ 69,786,799	$ 59,421,775
% of Total Investments at fair value	7.95%	7.03%
Illinois
Investment Holdings [Line Items]
Investments, amortized cost	$ 64,136,431	$ 64,421,998
Fair value of investments	$ 51,089,935	$ 53,218,615
% of Total Investments at fair value	5.82%	6.30%
Arizona
Investment Holdings [Line Items]
Investments, amortized cost	$ 43,048,182	$ 43,129,283
Fair value of investments	$ 44,223,012	$ 44,277,625
% of Total Investments at fair value	5.03%	5.24%
Pennsylvania
Investment Holdings [Line Items]
Investments, amortized cost	$ 42,794,571	$ 42,899,504
Fair value of investments	$ 42,003,646	$ 41,889,344
% of Total Investments at fair value	4.79%	4.96%
Ohio
Investment Holdings [Line Items]
Investments, amortized cost	$ 33,701,526	$ 34,223,452
Fair value of investments	$ 37,033,209	$ 37,333,236
% of Total Investments at fair value	4.22%	4.42%
Washington
Investment Holdings [Line Items]
Investments, amortized cost	$ 28,991,782	$ 28,978,375
Fair value of investments	$ 28,520,772	$ 28,480,471
% of Total Investments at fair value	3.25%	3.37%
New Jersey
Investment Holdings [Line Items]
Investments, amortized cost	$ 25,317,538	$ 25,395,054
Fair value of investments	$ 25,404,660	$ 25,140,343
% of Total Investments at fair value	2.90%	2.98%
Wisconsin
Investment Holdings [Line Items]
Investments, amortized cost	$ 27,522,337	$ 27,533,402
Fair value of investments	$ 24,405,731	$ 24,271,761
% of Total Investments at fair value	2.78%	2.87%
South Carolina
Investment Holdings [Line Items]
Investments, amortized cost	$ 23,985,102	$ 19,089,373
Fair value of investments	$ 23,307,462	$ 18,654,782
% of Total Investments at fair value	2.66%	2.21%
District Of Columbia
Investment Holdings [Line Items]
Investments, amortized cost	$ 17,021,109	$ 17,236,556
Fair value of investments	$ 20,332,646	$ 21,124,347
% of Total Investments at fair value	2.32%	2.50%
Georgia
Investment Holdings [Line Items]
Investments, amortized cost	$ 10,866,076	$ 10,919,642
Fair value of investments	$ 19,558,379	$ 19,692,757
% of Total Investments at fair value	2.23%	2.33%
Minnesota
Investment Holdings [Line Items]
Investments, amortized cost	$ 17,072,971	$ 16,972,086
Fair value of investments	$ 16,764,036	$ 15,952,072
% of Total Investments at fair value	1.91%	1.89%
Maryland
Investment Holdings [Line Items]
Investments, amortized cost	$ 16,774,301	$ 16,824,077
Fair value of investments	$ 16,600,434	$ 16,576,554
% of Total Investments at fair value	1.89%	1.96%
Colorado
Investment Holdings [Line Items]
Investments, amortized cost	$ 15,103,204	$ 15,204,934
Fair value of investments	$ 14,472,339	$ 14,295,470
% of Total Investments at fair value	1.65%	1.69%
Indiana
Investment Holdings [Line Items]
Investments, amortized cost	$ 14,357,762	$ 14,346,082
Fair value of investments	$ 14,478,350	$ 14,245,432
% of Total Investments at fair value	1.65%	1.69%
Canada
Investment Holdings [Line Items]
Investments, amortized cost	$ 13,312,608	$ 13,333,737
Fair value of investments	$ 13,123,054	$ 13,266,669
% of Total Investments at fair value	1.50%	1.57%
United Kingdom
Investment Holdings [Line Items]
Investments, amortized cost	$ 20,599,520	$ 20,530,087
Fair value of investments	$ 12,759,683	$ 14,445,481
% of Total Investments at fair value	1.45%	1.71%
Tennessee
Investment Holdings [Line Items]
Investments, amortized cost	$ 11,413,288
Fair value of investments	$ 11,413,288
% of Total Investments at fair value	1.30%
North Carolina
Investment Holdings [Line Items]
Investments, amortized cost	$ 10,446,206	$ 10,461,551
Fair value of investments	$ 10,631,238	$ 10,649,232
% of Total Investments at fair value	1.21%	1.26%
Massachusetts
Investment Holdings [Line Items]
Investments, amortized cost	$ 10,199,234	$ 10,215,356
Fair value of investments	$ 10,517,456	$ 10,527,659
% of Total Investments at fair value	1.20%	1.25%
Idaho
Investment Holdings [Line Items]
Investments, amortized cost	$ 9,742,830	$ 9,873,093
Fair value of investments	$ 9,778,705	$ 9,863,103
% of Total Investments at fair value	1.11%	1.17%
Missouri
Investment Holdings [Line Items]
Investments, amortized cost	$ 9,121,069	$ 9,142,111
Fair value of investments	$ 9,627,249	$ 9,656,287
% of Total Investments at fair value	1.10%	1.14%
New York
Investment Holdings [Line Items]
Investments, amortized cost	$ 5,133,148	$ 5,096,152
Fair value of investments	$ 5,140,494	$ 5,096,008
% of Total Investments at fair value	0.59%	0.61%
Michigan
Investment Holdings [Line Items]
Investments, amortized cost		$ 147,906
Fair value of investments		$ 149,001
% of Total Investments at fair value		0.02%