PORTFOLIO INVESTMENTS AND FAIR VALUE - Industry 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%
Services: Business
Investment Holdings [Line Items]
Investments, amortized cost	$ 207,234,534	$ 167,253,835
Fair value of investments	$ 218,866,572	$ 177,242,299
% of Total Investments at fair value	25.91%	22.93%
Healthcare & Pharmaceuticals
Investment Holdings [Line Items]
Investments, amortized cost	$ 86,469,854	$ 104,933,428
Fair value of investments	$ 88,103,319	$ 99,584,343
% of Total Investments at fair value	10.43%	12.89%
Aerospace & Defense
Investment Holdings [Line Items]
Investments, amortized cost	$ 48,137,394	$ 66,503,939
Fair value of investments	$ 39,526,086	$ 63,467,579
% of Total Investments at fair value	4.68%	8.21%
Consumer Goods: Non-Durable
Investment Holdings [Line Items]
Investments, amortized cost	$ 54,683,102	$ 30,597,444
Fair value of investments	$ 51,280,593	$ 29,447,632
% of Total Investments at fair value	6.07%	3.81%
Media: Advertising, Printing & Publishing
Investment Holdings [Line Items]
Investments, amortized cost	$ 52,830,447	$ 53,136,718
Fair value of investments	$ 52,525,839	$ 51,125,659
% of Total Investments at fair value	6.22%	6.62%
Consumer Goods: Durable
Investment Holdings [Line Items]
Investments, amortized cost	$ 45,601,928	$ 36,216,806
Fair value of investments	$ 44,529,176	$ 36,537,445
% of Total Investments at fair value	5.27%	4.73%
Beverage, Food, & Tobacco
Investment Holdings [Line Items]
Investments, amortized cost	$ 34,000,918	$ 34,089,805
Fair value of investments	$ 32,755,054	$ 33,791,047
% of Total Investments at fair value	3.88%	4.37%
Media: Broadcasting & Subscription
Investment Holdings [Line Items]
Investments, amortized cost	$ 18,615,052	$ 39,319,912
Fair value of investments	$ 21,445,307	$ 42,892,137
% of Total Investments at fair value	2.54%	5.55%
Chemicals, Plastics, & Rubber
Investment Holdings [Line Items]
Investments, amortized cost	$ 18,487,206	$ 14,638,210
Fair value of investments	$ 17,903,999	$ 14,288,322
% of Total Investments at fair value	2.12%	1.85%
Software
Investment Holdings [Line Items]
Investments, amortized cost	$ 37,582,855	$ 21,498,947
Fair value of investments	$ 37,975,255	$ 23,841,617
% of Total Investments at fair value	4.50%	3.08%
Capital Equipment
Investment Holdings [Line Items]
Investments, amortized cost	$ 33,538,647	$ 8,322,806
Fair value of investments	$ 33,801,951	$ 8,182,736
% of Total Investments at fair value	4.00%	1.06%
Construction & Building
Investment Holdings [Line Items]
Investments, amortized cost	$ 26,948,135	$ 27,333,360
Fair value of investments	$ 26,406,849	$ 27,282,504
% of Total Investments at fair value	3.13%	3.53%
Environmental Industries
Investment Holdings [Line Items]
Investments, amortized cost	$ 27,771,798	$ 26,826,229
Fair value of investments	$ 26,247,936	$ 26,355,789
% of Total Investments at fair value	3.11%	3.41%
Services: Consumer
Investment Holdings [Line Items]
Investments, amortized cost	$ 43,302,101	$ 40,034,415
Fair value of investments	$ 24,616,706	$ 22,682,119
% of Total Investments at fair value	2.92%	2.93%
Transportation & Logistics
Investment Holdings [Line Items]
Investments, amortized cost	$ 16,768,763	$ 18,583,797
Fair value of investments	$ 17,161,972	$ 18,934,004
% of Total Investments at fair value	2.03%	2.45%
Containers, Packaging, & Glass
Investment Holdings [Line Items]
Investments, amortized cost	$ 17,436,600	$ 17,557,212
Fair value of investments	$ 13,977,250	$ 17,710,907
% of Total Investments at fair value	1.65%	2.29%
Retail
Investment Holdings [Line Items]
Investments, amortized cost	$ 13,303,536
Fair value of investments	$ 13,217,256
% of Total Investments at fair value	1.56%
High Tech Industries
Investment Holdings [Line Items]
Investments, amortized cost	$ 14,126,954
Fair value of investments	$ 12,648,347
% of Total Investments at fair value	1.50%
Metals & Mining
Investment Holdings [Line Items]
Investments, amortized cost	$ 16,708,750	$ 16,838,603
Fair value of investments	$ 16,464,001	$ 16,974,999
% of Total Investments at fair value	1.95%	2.20%
FIRE: Real Estate
Investment Holdings [Line Items]
Investments, amortized cost	$ 15,642,093	$ 15,694,701
Fair value of investments	$ 5,866,397	$ 15,824,998
% of Total Investments at fair value	0.69%	2.05%
Automotive
Investment Holdings [Line Items]
Investments, amortized cost	$ 11,252,581	$ 11,064,612
Fair value of investments	$ 11,342,751	$ 10,800,000
% of Total Investments at fair value	1.34%	1.40%
Education
Investment Holdings [Line Items]
Investments, amortized cost	$ 11,057,921	$ 11,053,167
Fair value of investments	$ 10,498,760	$ 11,053,167
% of Total Investments at fair value	1.24%	1.43%
Utilities: Oil & Gas
Investment Holdings [Line Items]
Investments, amortized cost	$ 9,921,469	$ 9,901,900
Fair value of investments	$ 9,800,000	$ 9,800,000
% of Total Investments at fair value	1.16%	1.27%
Energy: Oil & Gas
Investment Holdings [Line Items]
Investments, amortized cost	$ 7,314,230	$ 11,098,912
Fair value of investments	$ 7,355,074	$ 10,461,417
% of Total Investments at fair value	0.87%	1.35%
Finance
Investment Holdings [Line Items]
Investments, amortized cost	$ 1,568,900	$ 2,507,199
Fair value of investments	$ 4,082,579	$ 4,108,356
% of Total Investments at fair value	0.48%	0.53%
Hotel, Gaming, & Leisure
Investment Holdings [Line Items]
Fair value of investments	$ 799,899	$ 484,250
% of Total Investments at fair value	0.09%	0.06%
Media: Diversified & Production
Investment Holdings [Line Items]
Investments, amortized cost	$ 5,517,409
Fair value of investments	$ 5,534,710
% of Total Investments at fair value	0.66%