Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Unrecognized Tax Benefits	$ 288,000	$ 312,000	$ 238,000
Interest Income on Tax Refund		482,000
Gross unrecognized tax benefits	288,000	312,000	$ 238,000
Accrued interest included in tax expense	15,000	13,000
Income Tax Examination, Penalties and Interest Accrued	$ 15,000	$ 13,000