Consolidated Statements of Changes in Net Assets Equity - USD ($)	Common Stock	Capital in Excess of Par Value	Total Distributable Earnings/(Loss)	Total
Balance at Sep. 30, 2022	$ 2,102	$ 675,401,802	$ (554,558,496)	$ 120,845,408
Balance (in Shares) at Sep. 30, 2022	2,102,129
OPERATIONS
Net investment income (loss)			6,510,166	6,510,166
Net realized gains (losses) on investments			(11,533,039)	(11,533,039)
Net change in unrealized appreciation (depreciation) on investments			31,941,213	31,941,213
CAPITAL SHARE TRANSACTIONS
Repurchase of common shares	$ (28)	(1,058,185)		(1,058,213)
Repurchase of common shares (in Shares)	(28,416)
Tax reclassification of shareholders’ equity in accordance with generally accepted accounting principles		20,468,622	(20,468,622)
Total Increase (Decrease) in Net Assets	$ (28)	19,410,437	6,449,718	25,860,127
Total Increase (Decrease) in Net Assets (in Shares)	(28,416)
Balance at Sep. 30, 2023	$ 2,074	694,812,239	(548,108,778)	146,705,535
Balance (in Shares) at Sep. 30, 2023	2,073,713
OPERATIONS
Net investment income (loss)			4,733,860	4,733,860
Net realized gains (losses) on investments			7,292,299	7,292,299
Net change in unrealized appreciation (depreciation) on investments			5,705,864	5,705,864
Deferred tax benefit (expense)			887,099	887,099
CAPITAL SHARE TRANSACTIONS
Distributions declared			(2,645,925)	(2,645,925)
Repurchase of common shares	$ (54)	(2,370,905)		(2,370,959)
Repurchase of common shares (in Shares)	(53,935)
Tax reclassification of shareholders’ equity in accordance with generally accepted accounting principles		12,468,254	(12,468,254)
Total Increase (Decrease) in Net Assets	$ (54)	10,097,349	3,504,943	13,602,238
Total Increase (Decrease) in Net Assets (in Shares)	(53,935)
Balance at Sep. 30, 2024	$ 2,020	704,909,588	(544,603,835)	$ 160,307,773
Balance (in Shares) at Sep. 30, 2024	2,019,778			2,019,778
OPERATIONS
Net investment income (loss)			5,140,321	$ 5,140,321
Net realized gains (losses) on investments			(11,922,506)	(11,922,506)
Net change in unrealized appreciation (depreciation) on investments			10,727,490	10,727,490
Deferred tax benefit (expense)			210,210	210,210
CAPITAL SHARE TRANSACTIONS
Distributions declared			(2,888,283)	(2,888,283)
Repurchase of common shares	$ (16)	(800,689)		(800,705)
Repurchase of common shares (in Shares)	(16,009)
Tax reclassification of shareholders’ equity in accordance with generally accepted accounting principles		531,749	(531,749)
Total Increase (Decrease) in Net Assets	$ (16)	(268,940)	735,483	466,527
Total Increase (Decrease) in Net Assets (in Shares)	(16,009)
Balance at Sep. 30, 2025	$ 2,004	$ 704,640,648	$ (543,868,352)	$ 160,774,300
Balance (in Shares) at Sep. 30, 2025	2,003,769			2,003,769