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Business Acquisitions - Proforma Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Amortization of intangible assets			$ 4,716
Dealflo Limited
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Amortization of intangible assets				$ 1,500
Revenue	$ 2,000	$ 600	$ 3,900	600
Dealflo Limited \| Intercompany elimination
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Revenue				300
Acquisition related costs				$ 1,100