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Note 4 - Property, Plant and Equipment | 6 Months Ended
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Jun. 30, 2022
Notes to Financial Statements |
Property, Plant and Equipment Disclosure [Text Block] | Note 4 — Property, Plant and Equipment Property, plant and equipment consisted of the following (in thousands):
|  | June 30, |  |  | December 31, |
|  | 2022 |  |  | 2021 |
Fixed Assets |  |  |  |  |  |  |  |
Computers |  | $ | 633 |  |  | $ | 633 |
Furniture, fixtures, and equipment |  |  | 549 |  |  |  | 464 |
Leasehold improvements |  |  | 101 |  |  |  | 101 |
Total fixed assets |  |  | 1,283 |  |  |  | 1,198 |
Less: accumulated depreciation |  |  | (933 | ) |  |  | (844 | )
Total fixed assets, net |  |  | 350 |  |  |  | 354 |
Project Assets (not placed in service) |  |  |  |  |  |  |  |
Terminal |  |  | 156,053 |  |  |  | 152,445 |
Pipeline |  |  | 21,017 |  |  |  | 21,017 |
Total Terminal and Pipeline assets |  |  | 177,070 |  |  |  | 173,462 |
Total property, plant and equipment, net |  | $ | 177,420 |  |  | $ | 173,816 |
Depreciation expense was $42 thousand and $45 thousand for the three months ended June 30, 2022 and 2021, respectively, and $89 thousand and $93 thousand for the six months ended June 30, 2022 and 2021, respectively.

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