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Property and Equipment (Schedule of Amortization Expense for Software) (Details) (USD $)
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Mar. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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|---|---|---|---|
| Property and equipment, gross | $ 1,806,299 | $ 1,667,191 | $ 1,227,081 |
| Accumulated depreciation and amortization | (541,216) | (455,871) | (229,972) |
| Property and equipment, net | 1,265,083 | 1,211,320 | 997,109 |
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Software [Member]
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| Property and equipment, gross | 1,491,035 | 1,388,824 | 927,455 |
| Accumulated depreciation and amortization | (361,296) | (268,744) | (60,290) |
| Property and equipment, net | $ 1,129,739 | $ 1,102,080 | $ 867,165 |