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REVENUE RECOGNITION - Schedule of Revenue Disaggregated by Source (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disaggregation of Revenue [Line Items]    
Total revenues $ 77,165 $ 41,550
LNG Product    
Disaggregation of Revenue [Line Items]    
Total revenues 55,699 27,339
Rental    
Disaggregation of Revenue [Line Items]    
Total revenues 10,651 6,338
Service    
Disaggregation of Revenue [Line Items]    
Total revenues 1,287 1,128
Power delivery    
Disaggregation of Revenue [Line Items]    
Total revenues 7,994 5,260
Other    
Disaggregation of Revenue [Line Items]    
Total revenues $ 1,534 $ 1,485