Intangible Assets and Goodwill (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2011
Finite Lived Intangible Assets [Line Items]
Amortization expense, intangible assets	$ 235	$ 250
Goodwill	5,585	6,158
Impairment of goodwill	573	0
Equity Partners [Member]
Finite Lived Intangible Assets [Line Items]
Goodwill		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