Intangible Assets and Goodwill (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2014	Dec. 31, 2012
Finite Lived Intangible Assets [Line Items]
Amortization expense, intangible assets	$ 269	$ 235
Goodwill	5,585	5,585
Impairment of goodwill	0	573
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