Sales (Percentage Of Total Revenues From Significant Customers) (Details)	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Revenue, Major Customer [Line Items]
Percentage of total revenues	72.00%	[1]	72.00%	[1]
Customer A [Member]
Revenue, Major Customer [Line Items]
Percentage of total revenues	26.00%	[1]	26.00%	[1]
Customer B [Member]
Revenue, Major Customer [Line Items]
Percentage of total revenues	16.00%	[1]	18.00%	[1]
Customer C [Member]
Revenue, Major Customer [Line Items]
Percentage of total revenues	16.00%	[1]	0.00%	[1]
Customer D [Member]
Revenue, Major Customer [Line Items]
Percentage of total revenues	14.00%	[1]	17.00%	[1]
Customer E [Member]
Revenue, Major Customer [Line Items]
Percentage of total revenues	0.00%	[1]	11.00%	[1]

[1] The “—” symbol represents less than 10% of total revenues