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East Tennessee Materials and Energy Corporation (M&EC) (Details Narrative) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Accrued liabilities | $ 924 |  | $ 924 |  | $ 2,791
Current closure liabilities due to changes in estimated future closure costs |  |  | 1,215 |  |
Net revenues | 13,160 | $ 12,715 | 25,817 | $ 25,422 |
East Tennessee Materials and Energy Corporation [Member] |  |  |  |  |
Net revenues | $ 76 | $ 1,692 | $ 132 | $ 5,072 |

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- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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