Note 1 - Description of Business and Summary of Significant Accounting Policies - Reconciliation of Cash and Cash Equivalents to Cash, Cash Equivalents and Merchant Reserves (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Cash and cash equivalents	$ 2,137,580	$ 2,159,698
Prepaid card load assets	528,434	535,479
Customer deposits
Merchant reserves	10,016,904	12,645,803
Cash, cash equivalents, prepaid card loads, customer deposits and merchant reserves, beginning of year	12,682,918	15,340,980
Cash and cash equivalents	5,011,132	2,137,580
Prepaid card load assets	7,610,242	528,434
Customer deposits	1,305,296
Merchant reserves	8,265,555	10,016,904
Cash, Cash Equivalents, Prepaid Card Load Assets, Customer Deposits and Merchant Reserves, End of Year	$ 22,192,225	$ 12,682,918