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Fair Value of Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2013
Fair Value Disclosures [Abstract] |
Summary of Company's Warrant Liability | The following table summarizes the warrant liability valuation for the years ended December 31, 2013 and 2012:
Description |  | Fair Value Measurements Warrant Liability |
Beginning balance, December 31, 2011 |  | $ | — |
Issuances (Level 3) |  |  | 18,742,526 |
Total (gains) or losses (Level 1 and 2) |  |  | 1,490,812 |
Ending balance, December 31, 2012 |  | $ | 20,233,338 |
Issuances (Level 3) |  |  | 1,465,000 |
Warrant conversion (Level 1 and 2) |  |  | (21,698,338 | )
Ending balance, December 31, 2013 |  | $ | — |

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