PORTFOLIO INVESTMENTS AND FAIR VALUE - Industry Concentration of Investment Portfolio (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 902,143,550	$ 875,823,177
Fair value of investments	$ 874,460,683	$ 844,733,638
% of Total Investments at fair value	100.00%	100.00%
Services: Business
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 198,018,290	$ 207,234,534
Fair value of investments	$ 207,963,749	$ 218,866,572
% of Total Investments at fair value	23.78%	25.91%
Healthcare & Pharmaceuticals
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 100,724,952	$ 86,469,854
Fair value of investments	$ 102,915,887	$ 88,103,319
% of Total Investments at fair value	11.77%	10.43%
High Tech Industries
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 90,795,799	$ 14,126,954
Fair value of investments	$ 91,992,012	$ 12,648,347
% of Total Investments at fair value	10.52%	1.50%
Media: Advertising, Printing & Publishing
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 57,640,321	$ 52,830,447
Fair value of investments	$ 58,741,061	$ 52,525,839
% of Total Investments at fair value	6.72%	6.22%
Consumer Goods: Non-Durable
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 63,145,301	$ 54,683,102
Fair value of investments	$ 52,938,611	$ 51,280,593
% of Total Investments at fair value	6.05%	6.07%
Beverage, Food, & Tobacco
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 42,554,582	$ 34,000,918
Fair value of investments	$ 45,074,817	$ 32,755,054
% of Total Investments at fair value	5.15%	3.88%
Consumer Goods: Durable
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 49,046,730	$ 45,601,928
Fair value of investments	$ 43,725,324	$ 44,529,176
% of Total Investments at fair value	5.00%	5.27%
Capital Equipment
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 32,517,673	$ 33,538,647
Fair value of investments	$ 33,879,801	$ 33,801,951
% of Total Investments at fair value	3.87%	4.00%
Services: Consumer
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 33,976,976	$ 43,302,101
Fair value of investments	$ 33,260,111	$ 24,616,706
% of Total Investments at fair value	3.80%	2.92%
Construction & Building
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 30,319,119	$ 26,948,135
Fair value of investments	$ 30,486,411	$ 26,406,849
% of Total Investments at fair value	3.49%	3.13%
Software
Investment Holdings 1 [Line Items]
Investments, amortized cost		$ 37,582,855
Fair value of investments		$ 37,975,255
% of Total Investments at fair value		4.50%
Aerospace & Defense
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 46,745,104	$ 48,137,394
Fair value of investments	$ 24,541,921	$ 39,526,086
% of Total Investments at fair value	2.81%	4.68%
Environmental Industries
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 24,219,811	$ 27,771,798
Fair value of investments	$ 22,997,844	$ 26,247,936
% of Total Investments at fair value	2.63%	3.11%
Media: Broadcasting & Subscription
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 17,952,103	$ 18,615,052
Fair value of investments	$ 20,760,920	$ 21,445,307
% of Total Investments at fair value	2.37%	2.54%
Transportation & Logistics
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 17,235,150	$ 16,768,763
Fair value of investments	$ 17,661,859	$ 17,161,972
% of Total Investments at fair value	2.02%	2.03%
Chemicals, Plastics, & Rubber
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 18,338,366	$ 18,487,206
Fair value of investments	$ 17,569,176	$ 17,903,999
% of Total Investments at fair value	2.01%	2.12%
Metals & Mining
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 16,580,562	$ 16,708,750
Fair value of investments	$ 16,625,000	$ 16,464,001
% of Total Investments at fair value	1.90%	1.95%
Containers, Packaging, & Glass
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 17,432,252	$ 17,436,600
Fair value of investments	$ 15,539,555	$ 13,977,250
% of Total Investments at fair value	1.78%	1.65%
Retail
Investment Holdings 1 [Line Items]
Investments, amortized cost		$ 13,303,536
Fair value of investments		$ 13,217,256
% of Total Investments at fair value		1.56%
Utilities: Oil & Gas
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 9,943,041	$ 9,921,469
Fair value of investments	$ 10,000,000	$ 9,800,000
% of Total Investments at fair value	1.14%	1.16%
Automotive
Investment Holdings 1 [Line Items]
Investments, amortized cost		$ 11,252,581
Fair value of investments		$ 11,342,751
% of Total Investments at fair value		1.34%
Education
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 10,251,179	$ 11,057,921
Fair value of investments	$ 8,367,469	$ 10,498,760
% of Total Investments at fair value	0.96%	1.24%
FIRE: Real Estate
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 17,285,138	$ 15,642,093
Fair value of investments	$ 6,175,994	$ 5,866,397
% of Total Investments at fair value	0.71%	0.69%
Media: Diversified & Production
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 5,662,174	$ 5,517,409
Fair value of investments	$ 5,763,247	$ 5,534,710
% of Total Investments at fair value	0.66%	0.66%
Finance
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 569,039	$ 1,568,900
Fair value of investments	$ 5,736,868	$ 4,082,579
% of Total Investments at fair value	0.66%	0.48%
Hotel, Gaming, & Leisure
Investment Holdings 1 [Line Items]
Fair value of investments	$ 890,968	$ 799,899
% of Total Investments at fair value	0.10%	0.09%
Energy: Oil & Gas
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 1,189,888	$ 7,314,230
Fair value of investments	$ 852,078	$ 7,355,074
% of Total Investments at fair value	0.10%	0.87%