Consolidated Statements of Operations - USD ($)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Non-controlled, non-affiliated investments:
Total interest income	$ 16,612,740	$ 14,303,415	$ 12,149,536
Dividend income
Total dividend income	7,462,265	6,863,133	6,856,268
Interest from cash and cash equivalents	194,954	500,079	400,031
Fee income (see Note 9)	992,363	514,949	324,290
Other income		22	402,138
Total Investment Income	25,262,322	22,181,598	20,132,263
Expenses:
Interest and financing expenses	10,278,961	6,609,473	5,531,833
Salaries and benefits	5,067,324	6,850,792	4,186,852
Professional fees, net	1,977,541	1,462,766	1,404,676
General and administrative expenses	1,239,221	1,093,922	983,274
Directors fees	816,000	750,000	728,833
Administrator expenses (see Note 6)	404,941	301,931	320,310
Insurance expenses	338,013	378,854	466,319
Total expenses	20,122,001	17,447,738	13,622,097
Net Investment Income	5,140,321	4,733,860	6,510,166
Net realized gains (losses):
Total net realized gains (losses)	(11,922,506)	7,292,299	(11,533,039)
Net change in unrealized gains (losses):
Total net change in unrealized gains (losses)	10,727,490	5,705,864	31,941,213
Deferred tax benefit (expense)	210,210	887,099
Total realized and unrealized gains (losses)	(984,806)	13,885,262	20,408,174
Net Increase (Decrease) in Net Assets Resulting from Operations	$ 4,155,515	$ 18,619,122	$ 26,918,340
Weighted average basic earnings per common share (in Dollars per share)	$ 2.06	$ 9.13	$ 12.87
Weighted average diluted earnings per common share (in Dollars per share)	$ 2.06	$ 9.13	$ 12.87
Weighted average common shares outstanding - basic (in Shares)	2,015,157	2,040,253	2,092,326
Weighted average common shares outstanding - diluted (in Shares)	2,015,157	2,040,253	2,092,326
Non-controlled, non-affiliated investments
Non-controlled, non-affiliated investments:
Cash	$ 12,190,186	$ 10,231,111	$ 8,031,539
Payment in-kind	1,355,918	938,879	506,555
Dividend income
Total dividend income	2,183,106	2,691,393	3,139,592
Net realized gains (losses):
Total net realized gains (losses)	(1,618,869)	740,924	(10,538,228)
Net change in unrealized gains (losses):
Total net change in unrealized gains (losses)	6,883,606	7,862,162	15,954,552
Affiliated investments
Non-controlled, non-affiliated investments:
Cash	614,409	742,881	1,925,293
Payment in-kind			460,856
Dividend income
Total dividend income	254,231	199,388
Net realized gains (losses):
Total net realized gains (losses)	(10,316,867)	(1,991,456)	(1,018,267)
Net change in unrealized gains (losses):
Total net change in unrealized gains (losses)	5,804,639	5,130,836	7,327,399
Controlled investments
Non-controlled, non-affiliated investments:
Cash	2,452,227	2,121,713	667,312
Payment in-kind		268,831	557,981
Dividend income
Total dividend income	5,024,928	3,972,352	3,716,676
Net realized gains (losses):
Total net realized gains (losses)	13,230	8,542,831	23,456
Net change in unrealized gains (losses):
Total net change in unrealized gains (losses)	$ (1,960,755)	$ (7,287,134)	$ 8,659,262