Revenue From Contracts With Customers - Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue
Net revenues	$ 16,234	$ 53,239	$ 95,379	$ 131,970
North America
Disaggregation of Revenue
Net revenues	479	12,182	37,920	32,984
Latin America
Disaggregation of Revenue
Net revenues	7,925	22,720	22,695	50,572
Asia Pacific
Disaggregation of Revenue
Net revenues	3,777	2,744	15,696	8,287
Europe
Disaggregation of Revenue
Net revenues	3,011	8,335	12,997	24,850
Middle East
Disaggregation of Revenue
Net revenues	306	3,899	2,202	6,364
Africa
Disaggregation of Revenue
Net revenues	344	2,874	1,939	7,541
Other
Disaggregation of Revenue
Net revenues	$ 392	$ 485	$ 1,930	$ 1,372