PORTFOLIO INVESTMENTS AND FAIR VALUE - Industry Concentration of Investment Portfolio (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 880,153,711	$ 902,143,550
Fair value of investments	$ 875,884,146	$ 874,460,683
% of Total Investments at fair value	100.00%	100.00%
Services: Business
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 197,937,690	$ 198,018,290
Fair value of investments	$ 209,619,236	$ 207,963,749
% of Total Investments at fair value	23.94%	23.78%
Healthcare & Pharmaceuticals
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 108,417,180	$ 100,724,952
Fair value of investments	$ 110,328,971	$ 102,915,887
% of Total Investments at fair value	12.61%	11.77%
High Tech Industries
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 71,603,900	$ 90,795,799
Fair value of investments	$ 72,553,276	$ 91,992,012
% of Total Investments at fair value	8.28%	10.52%
Media: Advertising, Printing & Publishing
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 62,240,408	$ 57,640,321
Fair value of investments	$ 63,533,613	$ 58,741,061
% of Total Investments at fair value	7.25%	6.72%
Consumer Goods: Non-Durable
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 63,003,175	$ 63,145,301
Fair value of investments	$ 52,686,261	$ 52,938,611
% of Total Investments at fair value	6.02%	6.05%
Beverage, Food, & Tobacco
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 42,350,360	$ 42,554,582
Fair value of investments	$ 46,034,041	$ 45,074,817
% of Total Investments at fair value	5.26%	5.15%
Consumer Goods: Durable
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 48,514,565	$ 49,046,730
Fair value of investments	$ 43,572,505	$ 43,725,324
% of Total Investments at fair value	4.97%	5.00%
Capital Equipment
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 40,632,591	$ 32,517,673
Fair value of investments	$ 42,389,663	$ 33,879,801
% of Total Investments at fair value	4.84%	3.87%
Services: Consumer
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 27,947,881	$ 33,976,976
Fair value of investments	$ 26,392,967	$ 33,260,111
% of Total Investments at fair value	3.01%	3.80%
Construction & Building
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 15,903,214	$ 30,319,119
Fair value of investments	$ 15,957,856	$ 30,486,411
% of Total Investments at fair value	1.82%	3.49%
Aerospace & Defense
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 27,195,732	$ 46,745,104
Fair value of investments	$ 25,280,263	$ 24,541,921
% of Total Investments at fair value	2.89%	2.81%
Environmental Industries
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 25,011,083	$ 24,219,811
Fair value of investments	$ 24,001,700	$ 22,997,844
% of Total Investments at fair value	2.74%	2.63%
Media: Broadcasting & Subscription
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 13,145,742	$ 17,952,103
Fair value of investments	$ 15,597,841	$ 20,760,920
% of Total Investments at fair value	1.78%	2.37%
Transportation & Logistics
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 17,209,566	$ 17,235,150
Fair value of investments	$ 17,616,857	$ 17,661,859
% of Total Investments at fair value	2.01%	2.02%
Chemicals, Plastics, & Rubber
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 18,306,671	$ 18,338,366
Fair value of investments	$ 18,043,304	$ 17,569,176
% of Total Investments at fair value	2.06%	2.01%
Metals & Mining
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 16,548,784	$ 16,580,562
Fair value of investments	$ 16,581,249	$ 16,625,000
% of Total Investments at fair value	1.89%	1.90%
Containers, Packaging, & Glass
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 17,435,678	$ 17,432,252
Fair value of investments	$ 15,784,005	$ 15,539,555
% of Total Investments at fair value	1.80%	1.78%
Retail
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 14,835,204
Fair value of investments	$ 14,707,696
% of Total Investments at fair value	1.68%
Utilities: Oil & Gas
Investment Holdings 1 [Line Items]
Investments, amortized cost		$ 9,943,041
Fair value of investments		$ 10,000,000
% of Total Investments at fair value		1.14%
Education
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 10,318,849	$ 10,251,179
Fair value of investments	$ 8,077,149	$ 8,367,469
% of Total Investments at fair value	0.92%	0.96%
FIRE: Real Estate
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 17,934,808	$ 17,285,138
Fair value of investments	$ 7,362,234	$ 6,175,994
% of Total Investments at fair value	0.84%	0.71%
Media: Diversified & Production
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 5,781,913	$ 5,662,174
Fair value of investments	$ 5,891,784	$ 5,763,247
% of Total Investments at fair value	0.67%	0.66%
Finance
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 557,135	$ 569,039
Fair value of investments	$ 6,825,990	$ 5,736,868
% of Total Investments at fair value	0.78%	0.66%
Hotel, Gaming, & Leisure
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 5,933,802
Fair value of investments	$ 6,847,793	$ 890,968
% of Total Investments at fair value	0.78%	0.10%
Energy: Oil & Gas
Investment Holdings 1 [Line Items]
Investments, amortized cost	$ 11,387,780	$ 1,189,888
Fair value of investments	$ 10,197,892	$ 852,078
% of Total Investments at fair value	1.16%	0.10%