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Property, Plant and Equipment
 3 Months Ended
Mar. 31, 2023
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment PROPERTY, PLANT AND EQUIPMENT
The Company’s property, plant and equipment at March 31, 2023 and December 31, 2022 consisted of the following (in thousands):
March 31,
2023		December 31,
2022
Liquefaction plants and systems$47,645 $47,636 
Real property and buildings2,065 2,057 
Vehicles and tanker trailers and equipment52,936 52,647 
Computer and office equipment459 470 
Construction in progress6,516 527 
Leasehold improvements30 31 
109,651 103,368 
Less: accumulated depreciation(57,722)(55,699)
$51,929 $47,669 
Depreciation expense totaled $2.0 million and $2.3 million for the three months ended March 31, 2023 and 2022, respectively, all of which is included in the Condensed Consolidated Statements of Operations as a separate line item.