Consolidated Schedule of Investments - Schedule of Investments (Details) - USD ($)	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Investments, market value, total	$ 256,934		$ 1,060,474
OTHER ASSETS IN EXCESS OF LIABILITIES — 13.4%	39,613		205
NET ASSETS — 100.0%	296,547	$ 747,259	1,060,679	$ 1,544,147	$ 1,017,920	$ 1,260,371	$ 30,600,000	$ 94,800,000	$ 102,100,000
Automotive Sector [Member] | Wrightspeed Inc [Member]
Investments, market value, total	0		0
Equipment Leasing Sector [Member] | EQX Capital, Inc [Member]
Investments, market value, total	23,173		29,466
Medical Devices Sector [Member] | IntraOp Medical Corp. [Member]
Investments, market value, total	$ 3,224		$ 25,287