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Fair Value Measurements (Tables)
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12 Months Ended |
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Dec. 31, 2014
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| Fair Value Disclosures [Abstract] |
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| Schedule Of Financial Assets And Liabilities At Fair Value [Table Text Block] |
The following table represents the fair value hierarchy for our financial assets and liabilities measured at fair value on a recurring basis for the year ended December 31, 2014 and 2013: | | | As of December 31, 2014 | | | Description | | Level 1 | | Level 2 | | Level 3 | | Total | | | | | | | | | | | | | | | | | | Assets | | | | | | | | | | | | | | | Investment in money market funds | | $ | 15,736,350 | | $ | - | | $ | - | | $ | 15,736,350 | | | | | | | | | | | | | | | | | | Total investment in money market funds | | $ | 15,736,350 | | $ | - | | $ | - | | $ | 15,736,350 | | | | | | | | | | | | | | | | | | Liabilities | | | | | | | | | | | | | | | Embedded conversion options | | $ | - | | $ | - | | $ | 4,362,225 | | $ | 4,362,225 | | | Stock purchase warrants | | | - | | | - | | | 25,484,596 | | | 25,484,596 | | | | | | | | | | | | | | | | | | Total derivative liabilities | | $ | - | | $ | - | | $ | 29,846,821 | | $ | 29,846,821 | | | | | As of December 31, 2013 | | | | | Level 1 | | Level 2 | | Level 3 | | Total | | | | | | | | | | | | | | | | | | Assets | | | | | | | | | | | | | | | Investment in money market funds | | $ | 2,303,556 | | $ | - | | $ | - | | $ | 2,303,556 | | | | | | | | | | | | | | | | | | Total investment in money market funds | | $ | 2,303,556 | | $ | - | | $ | - | | $ | 2,303,556 | | | | | | | | | | | | | | | | | | Liabilities | | | | | | | | | | | | | | | Embedded conversion options | | $ | - | | $ | - | | $ | 1,515,540 | | $ | 1,515,540 | | | Stock purchase warrants | | | - | | | - | | | 1,733,055 | | | 1,733,055 | | | | | | | | | | | | | | | | | | Total derivative liabilities | | $ | - | | $ | - | | $ | 3,248,595 | | $ | 3,248,595 | | |
| Fair Value, Measurement Inputs, Disclosure [Table Text Block] |
The following tables set forth a summary of changes in the fair value of Level 3 liabilities measured at fair value on a recurring basis for the year ended December 31, 2014 and 2013: | | | Balance at | | | | Modification | | Effect of | | | | | | Balance at | | | | | January 1, | | Established in | | of Convertible | | Conversion to | | Change in | | Reclass to | | December 31, | | | Description | | 2014 | | 2014 | | Debt Agreement | | Common Stock | | Fair Value | | Equity (1) | | 2014 | | | Derivative liabilities: | | | | | | | | | | | | | | | | | | | | | | | | Embedded conversion options | | $ | 1,515,540 | | $ | 8,825,935 | | $ | - | | $ | (1,932,693) | | $ | (4,046,557) | | $ | - | | $ | 4,362,225 | | | Stock purchase warrants | | | 1,733,055 | | | 29,137,682 | | | - | | | - | | | (4,054,365) | | | (1,331,776) | | | 25,484,596 | | | | | Balance at | | | | Modification | | | | | | | | Balance at | | | | | January 1, | | Established in | | of Convertible | | Conversion to | | Change in | | Reclass to | | December 31, | | | Description | | 2013 | | 2013 | | Debt Agreement | | Common Stock | | Fair Value | | Equity | | 2013 | | | Derivative liabilities: | | | | | | | | | | | | | | | | | | | | | | | | Embedded conversion options | | $ | 780,960 | | $ | 965,484 | | $ | 250,361 | | $ | (393,948) | | $ | 90,839 | | $ | (178,156) | | $ | 1,515,540 | | | Stock purchase warrants | | | - | | | 1,353,842 | | | - | | | - | | | 379,213 | | | - | | | 1,733,055 | | (1) Various warrants were reclassified to additional paid-in capital as a result of the expiration of non-standard anti-dilution clauses contained within the warrants. |
| Schedule of Impaired Intangible Assets [Table Text Block] |
The following table represents the fair value hierarchy for our non-financial assets that were measured during 2014 (we did not remeasure any of our non-financial assets during 2013): | | | Level 1 | | Level 2 | | Level 3 | | Total | | | Intangible assets | | | | | | | | | | | | | | | Intangible assets - IPR&D | | $ | — | | $ | — | | $ | 25,926,000 | | $ | 25,926,000 | | | Intangible assets - Trademarks | | | — | | | — | | | 706,229 | | | 706,229 | | | Total | | $ | — | | $ | — | | $ | 26,632,229 | | $ | 26,632,229 | | |