Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Revenue	$ 7,893	$ 6,966
European Union [Member]
Revenue	320	1,219
UNITED STATES
Revenue	7,573	5,747
License [Member]
Revenue		800
Professional Services [Member]
Revenue	5,279	3,964
Processing and Maintenance [Member]
Revenue	2,194	1,811
Third party [Member]
Revenue	$ 420	$ 391

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details