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Note 6 - Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2024
Notes to Financial Statements |
Property, Plant and Equipment Disclosure [Text Block] | 6. PROPERTY, PLANT AND EQUIPMENT, NET Property, Plant and Equipment The Company’s property, plant and equipment, net consisted of the following (in thousands):
|  | Estimated |  |  |  |  |  |  |  |  |
|  | Useful Life |  |  | December 31, |
|  | (years) |  |  | 2024 |  |  | 2023 |
Liquefaction plants and systems |  | 10 - 15 |  |  | $ | 56,752 |  |  | $ | 48,523 |
Real property and buildings |  | 3 - 25 |  |  |  | 2,082 |  |  |  | 2,066 |
Vehicles and tanker trailers and equipment |  | 2 - 10 |  |  |  | 49,754 |  |  |  | 49,689 |
Computer and office equipment |  | 2 - 7 |  |  |  | 545 |  |  |  | 458 |
Construction in progress |  | — |  |  |  | 8,082 |  |  |  | 9,879 |
Leasehold improvements |  | — |  |  |  | 31 |  |  |  | 31 |
|  |  |  |  |  | 117,246 |  |  |  | 110,646 |
Less: accumulated depreciation |  |  |  |  |  | (65,518 | ) |  |  | (61,167 | )
|  |  |  |  | $ | 51,728 |  |  | $ | 49,479 |
Depreciation expense for the years ended December 31, 2024 and 2023 totaled $7.1 million and $7.9 million respectively, of which all is included in the Consolidated Statements of Operations as its own line item. Construction in progress of $8.1 million and $9.9 million at December 31, 2024 and 2023, respectively, primarily relate to the deployment and build-out of liquefaction assets and the purchase of additional liquefaction assets.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-7 + Details
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