Summary Of Significant Accounting Policies (Schedule Of Sales To Individual Customers) (Details)	12 Months Ended
	Dec. 31, 2012 Customer One [Member]	Dec. 31, 2012 Customer Two [Member]	Dec. 31, 2011 Customer Three [Member]	Dec. 31, 2010 Customer Three [Member]
Summary Of Significant Accounting Policies [Line Items]
Customer percentage of total revenue	53.00%	10.00%	43.00%	63.00%