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Major Customer and Geographic Information (Schedule of Revenues from Non-affiliated Customers) (Details) - Revenue [Member]
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Customer A [Member]      
Revenue, Major Customer [Line Items]      
Risk percentage 47.00% 49.00% 14.00%
Customer B [Member]      
Revenue, Major Customer [Line Items]      
Risk percentage 19.00% 15.00% 10.00%