Supplemental Information - Schedule of Revenues 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, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 99,234	$ 92,062	$ 86,713	$ 73,309	$ 69,674	$ 64,756	$ 61,514	$ 52,125	$ 53,661	$ 50,109	$ 38,376	$ 34,880	$ 351,318	$ 248,069	$ 177,026
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues													232,805	168,414	134,688
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues													86,564	67,849	40,215
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues													8,782	4,653	1,820
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues													17,912	6,351	303
Greater China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues													$ 5,255	$ 802	$ 0