Domestic And Foreign Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Change in valuation allowance	$ (3,384,000)	$ 5,846,000	$ (3,443,000)
Unrecognized tax benefits	0	0	$ 0
Income Tax Examination, Penalties and Interest Expense	0	$ 0
United States IRS [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward	38,432,000
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward	$ 23,725,000