M&EC (Details Narrative) - USD ($) $ in Thousands  | 
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
Jun. 30, 2019  | 
Jun. 30, 2019  | 
Dec. 31, 2018  | 
|
| Asset Retirement Obligation Disclosure [Abstract] | |||
| Accrued liabilities | $ 156 | $ 156 | $ 1,142 | 
| Current liabilities | 330 | 330 | |
| Adjustment to closure liability | $ 165 | $ 330 | 
| X | ||||||||||
- 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition Current portion of 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- References No definition available. 
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- Definition Amount of increase (decrease) in asset retirement obligations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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