Note 17 - Unaudited Condensed Quarterly Financial Data - Quarterly Financial Information (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Net premiums earned (Note 11)	$ 0	$ (1,737,803)	$ 2,248,830	$ 2,070,381	$ 2,900,753	$ 3,437,196	$ 2,930,898	$ 2,579,616	$ 2,581,408	$ 11,848,463
Commission income									3,404,698	5,698,299
Net investment income	1,227	57,893	75,742	70,989	75,531	99,444	97,024	111,811
Net realized and unrealized (loss) gain	0	344,852	51,523	30,558	24	988,562	1,625,128	(4,377,990)
Total revenues	749,393	(562,162)	3,190,256	3,205,403	4,132,129	5,962,383	6,120,746	(48,962)	6,618,890	16,166,296
Net loss	$ (889,988)	$ (955,112)	$ (93,078)	$ 344,147	$ (3,301,881)	$ (8,277,992)	$ 1,465,255	$ (4,477,597)	$ (1,594,031)	$ (14,592,215)
Basic (loss) income per share (in dollars per share)	$ (1.43)	$ (1.54)	$ (0.15)	$ 0.55	$ (5.31)	$ (13.23)	$ 2.34	$ (7.16)	$ (2.57)	$ (23.36)
Diluted (loss) income per share (in dollars per share)	$ (1.43)	$ (1.54)	$ (0.15)	$ 0.55	$ (5.31)	$ (13.23)	$ 2.34	$ (7.16)	$ (2.57)	$ (23.36)
Financial Service [Member]
Commission income	$ 748,166	$ 808,896	$ 814,161	$ 1,033,475	$ 1,155,821	$ 1,437,181	$ 1,467,696	$ 1,637,601