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