Segment Information - Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	$ 27,870	$ 32,028	$ 30,155	$ 28,113	$ 28,078	$ 21,927	$ 18,183	$ 15,302	$ 118,166	$ 83,490	$ 56,112
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net									31,887	23,188	11,667
Rest of Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net									5,217	2,790	245
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net									20,942	17,514	9,546
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net									59,167	39,463	34,263
Rest of World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net									$ 953	$ 535	$ 391