Note 5 - Fair Value of Assets and Liabilities - Assets Measured at Fair Value (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Inputs, Level 1 [Member]
Investments in securities, at fair value	$ 6,408,355	$ 5,860,688
W-1 Warrant and Class B Common Stock liability, at fair value	0	0
Total	6,408,355	5,860,688
Fair Value, Inputs, Level 2 [Member]
Investments in securities, at fair value	0	0
W-1 Warrant and Class B Common Stock liability, at fair value	0	0
Total	0	0
Fair Value, Inputs, Level 3 [Member]
Investments in securities, at fair value	0	0
W-1 Warrant and Class B Common Stock liability, at fair value	828,000	576,000
Total	$ 828,000	$ 576,000