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Summary of Significant Accounting Policies (Details 4)
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6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
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Jun. 30, 2013
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Jun. 30, 2012
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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 revenue with customers | 31.00% | 40.00% | 33.00% | 41.00% |
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Customer B [Member]
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| Concentration percentage of revenue with customers | 12.00% | 11.00% | 12.00% | 14.00% |
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Customer C [Member]
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| Concentration percentage of revenue with customers | 6.00% | 17.00% | ||