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, 2023	Dec. 31, 2022
Cash and cash equivalents	$ 5,709,117	$ 7,255,321
Prepaid card load assets	20,170,761	36,590,893
Customer deposits	1,554,122	1,364,193
Merchant reserves	4,909,501	6,381,153
Cash, cash equivalents, prepaid card loads, customer deposits and merchant reserves, beginning of year	32,343,501	51,591,560
Cash and cash equivalents	7,155,687	5,709,117
Prepaid card load assets	31,578,973	20,170,761
Customer deposits	1,865,731	1,554,122
Merchant reserves	5,310,095	4,909,501
Cash, Cash Equivalents, Prepaid Card Load Assets, Customer Deposits and Merchant Reserves, End of Year	$ 45,910,486	$ 32,343,501