Note 7 - Accrued Expenses - Summary of Accrued Expenses (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Accrued commissions	$ 879,120	$ 373,154
Reserve for processing losses	623,494	515,199
Other accrued expenses	226,888	225,412
Accrued taxes	298,168	132,363
Accrued salaries	297,995	217,816
Total accrued expenses	$ 2,325,665	$ 1,463,944