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Revenue Recognition (Tables)
12 Months Ended
Dec. 31, 2019
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, 2019 and 2018 (in thousands):
 
Years Ended December 31,
 
2019
 
2018
LNG Product
$
34,244

 
$
30,200

Rental
6,569

 
4,584

Service
4,412

 
1,859

Other
1,846

 
699

 
$
47,071

 
$
37,342

Schedule of Contract Balances
The following table presents the changes in the Company’s contract liabilities for the years ended December 31, 2019 and 2018 (in thousands):
 
December 31,
 
2019
 
2018
Balance at beginning of year
$
93

 
$
14

Cash received, excluding amounts recognized as revenue
185

 
93

Amounts recognized as revenue
(93
)
 
(14
)
Balance at end of year
$
185

 
$
93