Note 2 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenues	$ 35,716,031	$ 25,231,741
Incentives and rebates	(358,870)	(419,518)
Net revenue	35,716,031	25,231,741
Insurance and Administration Fees [Member]
Revenues	18,603,759	12,819,157
Transaction Fees [Member]
Revenues	15,808,972	11,391,090
Other Fees [Member]
Revenues	$ 1,662,170	$ 1,441,012