Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue	$ 12,935	$ 10,304	$ 35,202	$ 26,250
UNITED STATES
Revenue	12,610	9,940	34,007	25,302
European Union [Member]
Revenue	28	364	687	948
Middle East [Member]
Revenue	297		508
License [Member]
Revenue	1,783	1,600	4,083	1,600
Professional Services [Member]
Revenue	6,893	5,392	18,740	15,827
Processing and Maintenance [Member]
Revenue	3,457	2,950	10,256	7,817
Third party [Member]
Revenue	$ 802	$ 362	$ 2,123	$ 1,006