Permit and Other Intangible Assets (Details Narrative) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Goodwill and Intangible Assets Disclosure [Abstract] | ||
| Amortization expense of intangible asset | $ 374 | $ 448 |
| X | ||||||||||
- Definition The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|