Net Intangible Assets (Schedule of Finite Lived Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,598	$ 1,598
Accumulated Amortization	1,033	798
Net Carrying Amount	565	800
Amortization expense	$ 235	$ 235
Non-compete [Member]
Finite-Lived Intangible Assets [Line Items]
Average Useful Life	5 years	5 years
Gross Carrying Amount	$ 120	$ 120
Accumulated Amortization	118	94
Net Carrying Amount	$ 2	$ 26
Unpatented Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Average Useful Life	7 years	7 years
Gross Carrying Amount	$ 1,478	$ 1,478
Accumulated Amortization	915	704
Net Carrying Amount	$ 563	$ 774