Goodwill and Intangible Assets, Net - Acquisition-Related Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 5,509	$ 5,770
Accumulated Amortization	(1,908)	(1,391)
Net Carrying Amount	3,601	4,379
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,581	4,797
Accumulated Amortization	(1,665)	(1,283)
Net Carrying Amount	2,916	3,514
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	928	973
Accumulated Amortization	(243)	(108)
Net Carrying Amount	$ 685	$ 865