Supplemental Information - Schedule of Revenues by Geographic Region (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues	$ 50,109	$ 21,674	$ 123,365	$ 52,646	$ 82,888
Germany
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues	$ 14,664	$ 1,766	$ 26,880	$ 2,659	$ 9,799