Intangible Assets (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Amortization expense for trademark and customer list	$ 155
Trademarks [Member]
Acquired finite-lived intangible assets amortization period	20 years
Customer Lists [Member]
Acquired finite-lived intangible assets amortization period	18 years