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Stockholders' Equity (Deficit) (Tables) | 3 Months Ended
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Mar. 31, 2015
Equity [Abstract] |
Summary of Preferred Stock Allocated to Investors | The Purchase Agreement provides for the Company to issue and sell to the Investor, after receiving stockholder approval, shares of the Company’s preferred stock in the amounts and at the prices set forth in the following table:
Convertible Preferred Stock |  | Shares |  |  | Price Per Share |  |  | Total Investment |
Series AA-1 |  |  | 101,124,042 |  |  | $ | 1.00 |  |  | $ | 101,124,042 |
Series AA-2 |  |  | 86,677,740 |  |  | $ | 0.50 |  |  |  | 43,338,870 |
|  |  | 187,801,782 |  |  |  |  |  |  | $ | 144,462,912 |
Summary of Fair Value of Options |
|  | March 31, 2015 |  | March 31, 2014
Risk-free interest rate |  | 1.78 - 2.00% |  | 2.11 - 2.66%
Expected volatility of common stock |  | 64.47 - 65.95% |  | 63.54 - 65.03%
Dividend yield |  | 0% |  | 0%
Expected life of options |  | 6.1 - 8.2 years |  | 6.1 - 8.2 years

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- Definition Preferred Stock Activity [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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