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East Tennessee Materials and Energy Corporation (“M&EC”) (Details Narrative) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Accrued liabilities | $ 1,864 |  | $ 2,791
Revenues | 12,658 | $ 12,707 |
East Tennessee Materials and Energy Corporation [Member] |  |  |
Revenues | $ 56 | $ 3,379 |

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