Note 2 - Summary of Significant Accounting Policies - Revenue From Asset Management Operations (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Investment Performance [Member]
Asset management operations revenue	$ 0	$ 1,283,600	$ 0	$ 3,338,071
Performance Fee Revenue [Member]
Asset management operations revenue	0	230,145	0	329,724
Management Fee Revenue [Member]
Asset management operations revenue	16,445	21,366	33,190	40,630
Fund Management Services Revenue [Member]
Asset management operations revenue	21,750	20,894	43,500	41,434
Asset Management [Member]
Asset management operations revenue	$ 38,195	$ 1,556,005	$ 76,690	$ 3,749,859