Note 2 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues	$ 9,651,340	$ 6,813,825	$ 26,157,606	$ 18,177,626
Incentives and rebates	(87,975)	(57,388)	(249,672)	(301,890)
Net revenue	9,651,340	6,813,825	26,157,606	18,177,626
Insurance and Administration Fees [Member]
Revenues	4,955,697	3,422,809	13,363,492	9,346,517
Transaction Fees [Member]
Revenues	4,308,576	3,019,518	11,873,358	8,077,555
Other Fees [Member]
Revenues	$ 475,042	$ 428,886	$ 1,170,428	$ 1,055,444