Net Sales (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue
Net Sales	$ 71,378	$ 66,901	$ 145,347	$ 133,767
Operating Segments | Debit and Credit
Disaggregation of Revenue
Net Sales	58,306	51,086	118,145	100,015
Operating Segments | Prepaid Debit
Disaggregation of Revenue
Net Sales	13,536	15,966	28,076	32,710
Operating Segments | Other
Disaggregation of Revenue
Net Sales				1,679
Intersegment eliminations
Disaggregation of Revenue
Net Sales	(464)	(151)	(874)	(637)
Products
Disaggregation of Revenue
Net Sales	39,077	33,125	81,578	65,882
Products | Operating Segments | Debit and Credit
Disaggregation of Revenue
Net Sales	39,541	33,276	82,452	66,120
Products | Operating Segments | Other
Disaggregation of Revenue
Net Sales				397
Products | Intersegment eliminations
Disaggregation of Revenue
Net Sales	(464)	(151)	(874)	(635)
Services
Disaggregation of Revenue
Net Sales	32,301	33,776	63,769	67,885
Services | Operating Segments | Debit and Credit
Disaggregation of Revenue
Net Sales	18,765	17,810	35,693	33,895
Services | Operating Segments | Prepaid Debit
Disaggregation of Revenue
Net Sales	$ 13,536	$ 15,966	$ 28,076	32,710
Services | Operating Segments | Other
Disaggregation of Revenue
Net Sales				1,282
Services | Intersegment eliminations
Disaggregation of Revenue
Net Sales				$ (2)