Note 1 - Basis of Presentation - Summary of Deferred Revenue (Details) - USD ($)	Jun. 30, 2024	Apr. 01, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023
Cash and cash equivalents	$ 7,498,256	$ 7,053,812	$ 7,155,687	$ 6,575,124	$ 6,763,813	$ 5,709,117
Prepaid card load assets	28,056,918	28,698,878	31,578,973	46,398,476	18,812,954	20,170,761
Customer deposits	1,808,006	1,808,263	1,865,731	1,563,192	1,575,075	1,554,122
Merchant reserves	4,851,839	5,322,095	5,310,095	5,141,040	4,744,615	4,909,501
Cash, cash equivalents, prepaid card load assets, customer deposits and merchant reserves, beginning of period	42,215,019	42,883,048	45,910,486	59,677,832	31,896,457	32,343,501
Cash and cash equivalents	7,498,256	7,498,256	7,053,812	7,155,687	6,575,124	6,763,813
Prepaid card load assets	28,056,918	28,056,918	28,698,878	31,578,973	46,398,476	18,812,954
Customer deposits	1,808,006	1,808,006	1,808,263	1,865,731	1,563,192	1,575,075
Merchant reserves	4,851,839	4,851,839	5,322,095	5,310,095	5,141,040	4,744,615
Cash, Cash Equivalents, Prepaid Card Load Assets, Customer Deposits and Merchant Reserves, End of Period	$ 42,215,019	$ 42,215,019	$ 42,883,048	$ 45,910,486	$ 59,677,832	$ 31,896,457