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Note 5 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment, Gross	$ 110,426	$ 110,646
Less: accumulated depreciation	(62,057)	(61,167)
Property, Plant and Equipment, Net	48,369	49,479
Liquefaction Plants and Systems [Member]
Property, Plant and Equipment, Gross	49,195	48,523
Building [Member]
Property, Plant and Equipment, Gross	2,066	2,066
Vehicles [Member]
Property, Plant and Equipment, Gross	49,023	49,689
Office Equipment [Member]
Property, Plant and Equipment, Gross	540	458
Construction in Progress [Member]
Property, Plant and Equipment, Gross	9,570	9,879
Leasehold Improvements [Member]
Property, Plant and Equipment, Gross	$ 32	$ 31

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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