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REVENUE RECOGNITION (Tables)
12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Schedule of Revenue Disaggregated by Source
The table below presents revenue disaggregated by source, for the years ended December 31, 2021 and 2020 (in thousands):
Year Ended December 31,
20212020
LNG Product$55,699 $27,339 
Rental10,651 6,338 
Service1,287 1,128 
Power delivery7,994 5,260 
Other1,534 1,485 
$77,165 $41,550 
Schedule of Contract Balances The following table presents the changes in contract liabilities for the years ended December 31, 2021 and 2020 (in thousands):
December 31,
20212020
Balance at beginning of period$357 $185 
Cash received from customers, excluding amounts recognized as revenue83 777 
Amounts recognized as revenue (357)(605)
Balance at end of period$83 $357