Permit and Other Intangible Assets - Schedule of Intangible Assets (Details) (Parenthetical) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Finite-lived intangible asset, useful life | 10 years | 10 years |
| Net carrying value | $ 1,549 | $ 1,838 |
| Permit [Member] | ||
| Net carrying value | $ 62 | $ 117 |
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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