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Revenue and Other Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Product Information [Line Items]
Revenue	$ 310,056	$ 256,012	$ 190,071
Core solutions
Product Information [Line Items]
Revenue	100,938	88,581	70,549
Value+ services
Product Information [Line Items]
Revenue	195,146	153,994	113,072
Other
Product Information [Line Items]
Revenue	$ 13,972	$ 13,437	$ 6,450

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