Intangible Assets and Goodwill (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Finite Lived Intangible Assets [Line Items]
Amortization expense, intangible assets	$ 59,000	$ 100,000
Goodwill, additions	0	0
Goodwill, Impairment Loss	$ 0	$ 0
Minimum [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived intangible asset, useful life	3 years
Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Finite-Lived intangible asset, useful life	7 years