Revenue - Disaggregated Revenue by Geography (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 [Line Items]
Total Revenues	$ 4,401	$ 8,948	$ 8,179	$ 19,103
United States
Disaggregation of Revenue [Line Items]
Total Revenues	3,310	7,562	6,407	16,377
Latin America
Disaggregation of Revenue [Line Items]
Total Revenues	59	17	205	192
Europe
Disaggregation of Revenue [Line Items]
Total Revenues	197	668	590	1,285
Asia
Disaggregation of Revenue [Line Items]
Total Revenues	835	701	977	1,249
Total Foreign Revenues
Disaggregation of Revenue [Line Items]
Total Revenues	$ 1,091	$ 1,386	$ 1,772	$ 2,726