Significant Customers, Geographic Areas, And Business Segments (Schedule Of Long-lived Assets Attributable To Each Geographic Area's Operations) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Total long-lived assets	$ 1,719	$ 1,400
United States [Member]
Property, Plant and Equipment [Line Items]
Total long-lived assets	929	1,081
Europe [Member]
Property, Plant and Equipment [Line Items]
Total long-lived assets	5	4
Asia And Other [Member]
Property, Plant and Equipment [Line Items]
Total long-lived assets	$ 785	$ 315