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Revenue Recognition - Schedule of Revenue Disaggregated by Source (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 $ 5,003 $ 11,095 $ 18,841 $ 24,070
LNG Product        
Disaggregation of Revenue [Line Items]        
Total revenues 2,884 8,699 12,015 18,953
Rental        
Disaggregation of Revenue [Line Items]        
Total revenues 385 1,337 3,275 3,581
Service        
Disaggregation of Revenue [Line Items]        
Total revenues 1,268 391 2,578 682
Other        
Disaggregation of Revenue [Line Items]        
Total revenues $ 466 $ 668 $ 973 $ 854