Income Taxes (Reconciliation Of Gross Unrecognized Tax Benefits) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Gross unrecognized tax benefits at January 1	$ 220,280	$ 219,908
Increases in tax positions for prior years	119	0
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(71)	0
Increases in tax positions for current year	354	372
Gross unrecognized tax benefits at December 31	$ 220,682	$ 220,280