SEGMENTS AND INFORMATION BY GEOGRAPHIC LOCATION - SCHEDULE OF REVENUE BY PRODUCT LINE (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Revenue	$ 44,107	$ 33,561	$ 86,321	$ 65,568
Subscription and services
Segment Reporting Information [Line Items]
Revenue	25,992	20,112	50,945	39,369
Payments
Segment Reporting Information [Line Items]
Revenue	17,619	12,904	34,369	25,056
Product and other
Segment Reporting Information [Line Items]
Revenue	$ 496	$ 545	$ 1,007	$ 1,143