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Inventories (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Inventories [Abstract] |  |
Natural gas | $ 1,569 | $ 3,302
Renewable credits | 8,630 | 10,531
Solar panels | 5,107 | 1,881
Totals | 15,306 | $ 15,714
Inventory valuation allowance | $ 800 |

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