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Concentration of Credit Risk and Major Customers (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Customer A [Member]
       
Entity-Wide Revenue and Accounts Receivable, Major Customer, Percentage 53.00% 20.00% 39.00% 16.00%
Customer B [Member]
       
Entity-Wide Revenue and Accounts Receivable, Major Customer, Percentage 19.00% 19.00% 20.00% 20.00%
Customer C [Member]
       
Entity-Wide Revenue and Accounts Receivable, Major Customer, Percentage 0.00% [1] 19.00% 11.00% 13.00%
Customer D [Member]
       
Entity-Wide Revenue and Accounts Receivable, Major Customer, Percentage 0.00% [1] 12.00% 0.00% [1] 18.00%
[1] Customer accounted for less than 10% for the period indicated.