PORTFOLIO INVESTMENTS AND FAIR VALUE - Geographical Concentration of Investment Portfolio (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Investment Holdings [Line Items]
Investments, amortized cost	$ 875,823,177	$ 785,005,957
Fair value of investments	$ 844,733,638	$ 772,873,326
% of Total Investments at fair value	100.00%	100.00%
Texas
Investment Holdings [Line Items]
Investments, amortized cost	$ 191,422,143	$ 161,550,893
Fair value of investments	$ 171,165,597	$ 142,657,160
% of Total Investments at fair value	20.26%	18.46%
California
Investment Holdings [Line Items]
Investments, amortized cost	$ 167,833,384	$ 153,793,390
Fair value of investments	$ 165,340,017	$ 157,446,299
% of Total Investments at fair value	19.57%	20.37%
Illinois
Investment Holdings [Line Items]
Investments, amortized cost	$ 64,421,998	$ 69,780,236
Fair value of investments	$ 53,218,615	$ 71,066,882
% of Total Investments at fair value	6.30%	9.20%
Florida
Investment Holdings [Line Items]
Investments, amortized cost	$ 60,593,839	$ 12,966,130
Fair value of investments	$ 59,421,775	$ 13,220,344
% of Total Investments at fair value	7.03%	1.71%
Arizona
Investment Holdings [Line Items]
Investments, amortized cost	$ 43,129,283	$ 31,165,320
Fair value of investments	$ 44,277,625	$ 31,117,284
% of Total Investments at fair value	5.24%	4.03%
Pennsylvania
Investment Holdings [Line Items]
Investments, amortized cost	$ 42,899,504	$ 42,866,707
Fair value of investments	$ 41,889,344	$ 42,604,002
% of Total Investments at fair value	4.96%	5.51%
Washington
Investment Holdings [Line Items]
Investments, amortized cost	$ 28,978,375	$ 41,067,458
Fair value of investments	$ 28,480,471	$ 40,790,941
% of Total Investments at fair value	3.37%	5.28%
Ohio
Investment Holdings [Line Items]
Investments, amortized cost	$ 34,223,452	$ 36,551,789
Fair value of investments	$ 37,333,236	$ 38,218,517
% of Total Investments at fair value	4.42%	4.94%
Wisconsin
Investment Holdings [Line Items]
Investments, amortized cost	$ 27,533,402	$ 25,880,018
Fair value of investments	$ 24,271,761	$ 25,893,643
% of Total Investments at fair value	2.87%	3.35%
New Jersey
Investment Holdings [Line Items]
Investments, amortized cost	$ 25,395,054	$ 25,518,474
Fair value of investments	$ 25,140,343	$ 23,548,670
% of Total Investments at fair value	2.98%	3.05%
District Of Columbia
Investment Holdings [Line Items]
Investments, amortized cost	$ 17,236,556	$ 11,798,134
Fair value of investments	$ 21,124,347	$ 13,137,892
% of Total Investments at fair value	2.50%	1.70%
Georgia
Investment Holdings [Line Items]
Investments, amortized cost	$ 10,919,642	$ 11,066,059
Fair value of investments	$ 19,692,757	$ 19,045,442
% of Total Investments at fair value	2.33%	2.46%
United Kingdom
Investment Holdings [Line Items]
Investments, amortized cost	$ 20,530,087	$ 21,320,828
Fair value of investments	$ 14,445,481	$ 19,537,231
% of Total Investments at fair value	1.71%	2.53%
South Carolina
Investment Holdings [Line Items]
Investments, amortized cost	$ 19,089,373	$ 13,270,660
Fair value of investments	$ 18,654,782	$ 13,270,530
% of Total Investments at fair value	2.21%	1.71%
Maryland
Investment Holdings [Line Items]
Investments, amortized cost	$ 16,824,077	$ 16,838,603
Fair value of investments	$ 16,576,554	$ 16,974,999
% of Total Investments at fair value	1.96%	2.20%
Minnesota
Investment Holdings [Line Items]
Investments, amortized cost	$ 16,972,086	$ 15,922,220
Fair value of investments	$ 15,952,072	$ 15,688,073
% of Total Investments at fair value	1.89%	2.03%
Colorado
Investment Holdings [Line Items]
Investments, amortized cost	$ 15,204,934	$ 15,151,135
Fair value of investments	$ 14,295,470	$ 14,980,283
% of Total Investments at fair value	1.69%	1.94%
Indiana
Investment Holdings [Line Items]
Investments, amortized cost	$ 14,346,082
Fair value of investments	$ 14,245,432
% of Total Investments at fair value	1.69%
Canada
Investment Holdings [Line Items]
Investments, amortized cost	$ 13,333,737	$ 13,418,371
Fair value of investments	$ 13,266,669	$ 13,265,324
% of Total Investments at fair value	1.57%	1.71%
New York
Investment Holdings [Line Items]
Investments, amortized cost	$ 5,096,152	$ 25,161,998
Fair value of investments	$ 5,096,008	$ 27,334,823
% of Total Investments at fair value	0.61%	3.54%
Idaho
Investment Holdings [Line Items]
Investments, amortized cost	$ 9,873,093
Fair value of investments	$ 9,863,103
% of Total Investments at fair value	1.17%
North Carolina
Investment Holdings [Line Items]
Investments, amortized cost	$ 10,461,551	$ 10,503,957
Fair value of investments	$ 10,649,232	$ 10,360,521
% of Total Investments at fair value	1.26%	1.34%
Massachusetts
Investment Holdings [Line Items]
Investments, amortized cost	$ 10,215,356	$ 10,281,055
Fair value of investments	$ 10,527,659	$ 10,348,341
% of Total Investments at fair value	1.25%	1.34%
Missouri
Investment Holdings [Line Items]
Investments, amortized cost	$ 9,142,111	$ 9,871,933
Fair value of investments	$ 9,656,287	$ 10,600,866
% of Total Investments at fair value	1.14%	1.37%
Virginia
Investment Holdings [Line Items]
Investments, amortized cost		$ 500,000
Fair value of investments		$ 616,212
% of Total Investments at fair value		0.08%
Michigan
Investment Holdings [Line Items]
Investments, amortized cost	$ 147,906
Fair value of investments	$ 149,001
% of Total Investments at fair value	0.02%
Puerto Rico
Investment Holdings [Line Items]
Investments, amortized cost		$ 8,760,589
Fair value of investments		$ 1,149,047
% of Total Investments at fair value		0.15%