Statements Of Cash Flows (Supplemental Disclosures Of Cash Flow Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statements Of Cash Flows [Abstract]
Interest received	$ 1	$ 1	$ 1
Interest paid	437	432	512
Income taxes paid	$ 263	132	$ 27
Shares issued for director services in lieu of fees		$ 1