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Inventory (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Inventory, Net, Total | $ 7,814,000 | $ 7,426,000
Current portion of inventory | 7,814,000 | 7,426,000
Non-current portion of inventory [Member] |  |
Inventory, Net, Total | 7,814,000 | 7,426,000
Plant Inventory [Member] |  |
Inventory, Net, Total | 463,000 | 0
Conversion Facility Inventory [Member] |  |
Inventory, Net, Total | $ 7,351,000 | $ 7,426,000

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