Note 5 - Fair Value of Assets and Liabilities - Assets Measured at Fair Value (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Inputs, Level 1 [Member]
Investments in securities, at fair value	$ 5,860,688	$ 2,265,088
W-1 Warrant and Class B Common Stock liability, at fair value	0	0
Total	5,860,688	2,265,088
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	576,000	0
Total	$ 576,000	$ 0