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Concentration of Sales to Major Customers (Narrative) (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Customer Revenue Concentration
       
Concentration Risk, Percentage 92.00% 89.00% 91.00% 89.00%
Accounts Receivable Concentration
       
Concentration Risk, Percentage     100.00% 52.00%