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Summary of Significant Accounting Policies (Details 1)
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Jun. 30, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Customer A [Member]
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| Concentration Percentage Of Accounts Receivable With Customers | 14.00% | 19.00% | 36.00% |
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Customer B [Member]
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| Concentration Percentage Of Accounts Receivable With Customers | 8.00% | 6.00% | 7.00% |
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Customer C [Member]
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| Concentration Percentage Of Accounts Receivable With Customers | 7.00% | 0.00% | 12.00% |
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Customer D [Member]
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| Concentration Percentage Of Accounts Receivable With Customers | 1.00% | 10.00% |