PORTFOLIO INVESTMENTS AND FAIR VALUE - Industry concentration of investment portfolio (Details) - USD ($)	Jun. 30, 2026	Dec. 31, 2025
Investment Holdings 1 [Line Items]
Cost	$ 410,125,150	$ 396,791,982
Fair Value	$ 419,527,201	$ 400,131,924
% of Total Investments at Fair Value	100.00%	100.00%
Services: Business
Investment Holdings 1 [Line Items]
Cost	$ 101,607,255	$ 89,567,846
Fair Value	$ 103,701,073	$ 88,693,867
% of Total Investments at Fair Value	24.72%	22.18%
Healthcare & Pharmaceuticals
Investment Holdings 1 [Line Items]
Cost	$ 63,218,090	$ 48,453,123
Fair Value	$ 64,354,225	$ 49,442,697
% of Total Investments at Fair Value	15.34%	12.36%
Capital Equipment
Investment Holdings 1 [Line Items]
Cost	$ 49,177,822	$ 39,615,369
Fair Value	$ 51,431,332	$ 41,025,852
% of Total Investments at Fair Value	12.26%	10.25%
High Tech Industries
Investment Holdings 1 [Line Items]
Cost	$ 35,719,426	$ 49,010,176
Fair Value	$ 37,537,849	$ 50,269,878
% of Total Investments at Fair Value	8.95%	12.56%
Media: Advertising, Printing & Publishing
Investment Holdings 1 [Line Items]
Cost	$ 25,519,766	$ 25,391,544
Fair Value	$ 24,707,442	$ 24,600,455
% of Total Investments at Fair Value	5.89%	6.15%
Construction & Building
Investment Holdings 1 [Line Items]
Cost	$ 21,921,782	$ 22,265,430
Fair Value	$ 23,456,120	$ 22,580,411
% of Total Investments at Fair Value	5.59%	5.64%
Services: Consumer
Investment Holdings 1 [Line Items]
Cost	$ 20,496,296	$ 20,534,718
Fair Value	$ 20,581,634	$ 20,334,410
% of Total Investments at Fair Value	4.91%	5.08%
Consumer Goods: Non-Durable
Investment Holdings 1 [Line Items]
Cost	$ 17,091,117	$ 17,729,105
Fair Value	$ 18,561,074	$ 19,164,105
% of Total Investments at Fair Value	4.42%	4.79%
Beverage & Food
Investment Holdings 1 [Line Items]
Cost	$ 17,040,064	$ 16,571,541
Fair Value	$ 16,937,430	$ 16,445,790
% of Total Investments at Fair Value	4.04%	4.11%
Media: Diversified & Production
Investment Holdings 1 [Line Items]
Cost	$ 11,062,534	$ 12,111,013
Fair Value	$ 10,634,588	$ 11,899,148
% of Total Investments at Fair Value	2.53%	2.97%
Consumer Goods: Durable
Investment Holdings 1 [Line Items]
Cost	$ 8,700,069	$ 8,379,684
Fair Value	$ 9,073,230	$ 8,649,708
% of Total Investments at Fair Value	2.16%	2.16%
Chemicals, Plastics, & Rubber
Investment Holdings 1 [Line Items]
Cost	$ 8,895,897	$ 14,236,397
Fair Value	$ 8,970,775	$ 14,131,809
% of Total Investments at Fair Value	2.14%	3.53%
Energy: Oil & Gas
Investment Holdings 1 [Line Items]
Cost	$ 8,608,724	$ 8,144,225
Fair Value	$ 8,915,605	$ 8,500,887
% of Total Investments at Fair Value	2.13%	2.12%
Retail
Investment Holdings 1 [Line Items]
Cost	$ 7,510,265	$ 6,547,870
Fair Value	$ 7,527,504	$ 6,545,924
% of Total Investments at Fair Value	1.79%	1.64%
Environmental Industries
Investment Holdings 1 [Line Items]
Cost	$ 7,476,749	$ 7,603,889
Fair Value	$ 7,046,837	$ 7,162,621
% of Total Investments at Fair Value	1.68%	1.79%
Wholesale
Investment Holdings 1 [Line Items]
Cost	$ 6,079,294	$ 5,886,684
Fair Value	$ 6,090,483	$ 5,873,214
% of Total Investments at Fair Value	1.45%	1.47%
Hotel, Gaming, & Leisure
Investment Holdings 1 [Line Items]
Cost		$ 4,743,368
Fair Value		$ 4,811,148
% of Total Investments at Fair Value		1.20%