Significant Accounting Policies (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Fair value beginning balance	$ 13,000
Fair value ending balance	15,000
Control Investments [Member]
Fair value beginning balance	13,000
Fair value ending balance	15,000
Level 3 [Member]
Fair value beginning balance	13,000	$ 7,000
Change in unrealized appreciation	2,000	1,500
Fair value ending balance	15,000	8,500
Level 3 [Member] | Non-affiliate Investments [Member]
Fair value beginning balance	0	0
Change in unrealized appreciation	0	0
Fair value ending balance	0	0
Level 3 [Member] | Affiliate Investments [Member]
Fair value beginning balance	0	0
Change in unrealized appreciation	0	0
Fair value ending balance	0	0
Level 3 [Member] | Control Investments [Member]
Fair value beginning balance	13,000	7,000
Change in unrealized appreciation	2,000	1,500
Fair value ending balance	$ 15,000	$ 8,500