Inventory (Details) - USD ($) $ in Thousands |
12 Months Ended | |
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Dec. 31, 2017 |
Dec. 31, 2016 |
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| Inventory | ||
| Inventory, Net, Total | $ 4,515 | $ 4,109 |
| Reduction in inventory valuation | 2,600 | |
| In Process Inventory [Member] | ||
| Inventory | ||
| Inventory, Net, Total | 315 | 897 |
| Plant Inventory [Member] | ||
| Inventory | ||
| Inventory, Net, Total | 369 | 461 |
| Conversion Facility Inventory [Member] | ||
| Inventory | ||
| Inventory, Net, Total | $ 3,831 | $ 2,751 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of increase (decrease) in allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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