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Schedule of Goodwill (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2014 | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | --- | --- | --- | ---
Finite Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill | $ 6,158 | $ 6,158 |  |  |
Equity Partners [Member] |  |  |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill | 573 | 573 |  |  | $ 600
HGP [Member] |  |  |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill | 2,040 | 2,040 |  | $ 4,700 |
NLEX [Member] |  |  |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill | $ 3,545 | $ 3,545 | $ 3,500 |  |

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