Domestic And Foreign Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Change in valuation allowance	$ (3,443,000)	$ (291,000)	$ 59,000
Net Operating Loss Carryforwards Limitations	438,000
Unrecognized tax benefits	0	0	$ 0
Accrued amounts for payments of interest penalties	0	$ 0
USA [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward	$ 32,019,000
Net operating loss carryforwards expiration date	Jan. 31, 2022
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward	$ 15,759,000
Net operating loss carryforwards expiration date	Jan. 31, 2017