Liquidity and Financing Arrangements (Details Narrative) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Cash and cash equivalents	$ 22,300,000	$ 23,400,000
Net assets	15,000,000.0	12,000,000.0
Invested in portfolio securities	37,400,000	36,400,000
Restricted cash and temporary cash investments	3,000,000.0	2,500,000
Margin deposit	30,000.00	30,000.00
Borrowed amount	3,000,000.0	2,500,000
Equus Energy, LLC [Member]
Investment in additional equity	150,000
US Treasury Securities [Member]
Restricted cash and temporary cash investments	3,000,000.0	2,500,000
Borrowed amount	$ 3,030,000.00	$ 2,530,000