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Inventories (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
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Inventories [Abstract] |  |
Natural gas | $ 763 | $ 1,052
Renewable credits | 12,504 | 14,940
Solar Panels: |  |
Finished goods | 1,219 | 424
Raw materials | 216 | 216
Total solar panels inventory | 1,435 | 640
Totals | $ 14,702 | $ 16,632

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