Revenue From Contracts With Customers - Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue
Net revenues	$ 22,731	$ 41,775	$ 79,145	$ 78,731
North America
Disaggregation of Revenue
Net revenues	5,631	13,645	37,441	20,802
Latin America
Disaggregation of Revenue
Net revenues	4,966	14,321	14,770	27,852
Asia Pacific
Disaggregation of Revenue
Net revenues	2,631	3,676	11,919	5,543
Europe
Disaggregation of Revenue
Net revenues	6,176	6,123	9,986	16,515
Middle East
Disaggregation of Revenue
Net revenues	942	1,106	1,896	2,465
Africa
Disaggregation of Revenue
Net revenues	1,004	2,278	1,595	4,667
Other
Disaggregation of Revenue
Net revenues	$ 1,381	$ 626	$ 1,538	$ 887