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Revenue Recognition
 9 Months Ended
Sep. 30, 2021
Revenue from Contract with Customer [Abstract]  
Revenue Recognition Revenue Recognition
Disaggregated Revenues
The table below presents revenue disaggregated by source, for the three and nine months ended September 30, 2021 and 2020 (in thousands):
Three Months Ended
September 30,		Nine Months Ended
September 30,
Revenues2021202020212020
LNG Product$14,420 $6,594 $37,927 $18,609 
Rental2,712 737 8,039 4,012 
Service334 187 957 593 
Power Delivery1,925 1,352 5,129 3,638 
Other313 149 1,368 1,008 
$19,704 $9,019 $53,420 $27,860 
The table below presents revenue disaggregated by geographic location, for the three and nine months ended September 30, 2021 and 2020 (in thousands):
Three Months Ended
September 30,		Nine Months Ended
September 30,
Revenues2021202020212020
Brazil$1,925 $1,352 $5,129 $3,638 
Mexico3,501 2,729 7,198 2,778 
United States14,278 4,938 41,093 21,444 
$19,704 $9,019 $53,420 $27,860 
See Note 4—Business Segments, below, for additional disaggregation of revenue.
Contract Liabilities
The Company recognizes contract liabilities upon receipt of payments for which the performance obligations have not been fulfilled at the reporting date, resulting in deferred revenue. Contract liabilities are included in accrued liabilities in the accompanying unaudited condensed consolidated balance sheets. The table below presents the changes in the Company’s contract liabilities for the nine months ended September 30, 2021 and December 31, 2020 (in thousands):
September 30,
2021		December 31,
2020
Balance at beginning of period$357 $185 
Cash received, excluding amounts recognized as revenue283 777 
Amounts recognized as revenue(352)(605)
Balance at end of period$288 $357 
The Company has no other material contract assets or liabilities and contract costs.