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Stock Purchase Warrants (Tables) | 3 Months Ended
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Mar. 31, 2015
Stock Purchase Warrants [Abstract] |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block] | The assumptions used by the Company are summarized in the following table:
|  | March 31, 2015 |  |  | December 31, 2014 |  |  | Issuance Date |
Closing stock price |  | $ | 2.19 |  |  | $ | 1.46 |  |  | $ | 1.75 |
Expected dividends |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Expected volatility |  |  | 90 | % |  |  | 90 | % |  |  | 95 | %
Risk free interest rate |  |  | 1.26 | % |  |  | 1.59 | % |  |  | 1.39 | %
Expected life of warrant |  |  | 4.55 years |  |  |  | 4.79 years |  |  |  | 5 years |
Schedule Of Estimated Fair Value Of The Warrant Liability [Table Text Block] | The following table summarizes the estimated fair value of the warrant liability (in thousands):
Balance at December 31, 2014 |  | $ | 6,756 |
Change in fair value of warrant liability |  |  | 4,152 |
Balance at March 31, 2015 |  | $ | 10,908 |
Schedule Of Warrant Activity [Table Text Block] | A summary of warrant activity for the Company for the three months ended March 31, 2015 and for the year ended December 31, 2014 is as follows:
|  |  |  |  | Weighted Average |
|  | Number of Warrants |  | Exercise Price |
Balance at December 31, 2013 |  |  | 1,632,501 |  | $ | 1.99 |
Granted |  |  | 7,029,808 |  | $ | 1.75 |
Exercised |  |  | (232,619) |  | $ | 1.47 |
Forfeited |  |  | (454,896) |  | $ | 1.88 |
Balance at December 31, 2014 |  |  | 7,974,794 |  | $ | 1.80 |
Granted |  |  | - |  | $ | - |
Exercised |  |  | - |  | $ | - |
Forfeited |  |  | - |  | $ | - |
Balance at March 31, 2015 |  |  | 7,974,794 |  | $ | 1.80 |
Schedule Of Warrant Outstanding and Exercisable [Table Text Block] | A summary of all outstanding and exercisable warrants as of March 31, 2015 is as follows:
|  |  |  |  |  |  |  | Weighted Average |  |  |  |
Exercise |  | Warrants |  | Warrants |  | Remaining |  | Aggregate |
Price |  | Outstanding |  | Exercisable |  | Contractual Life |  | Intrinsic Value |
$ | 1.60 |  |  | 316,522 |  |  | 316,522 |  | 2.57 years |  | $ | 187,000 |
$ | 1.75 |  |  | 7,029.808 |  |  | 7,029,808 |  | 4.53 years |  | $ | 3,903,000 |
$ | 2.22 |  |  | 517,257 |  |  | 517,257 |  | 1.66 years |  | $ | - |
$ | 3.30 |  |  | 61,207 |  |  | 61,207 |  | 0.16 years |  | $ | - |
$ | 3.75 |  |  | 50,000 |  |  | 50,000 |  | 0.88 years |  | $ | - |
$ | 1.80 |  |  | 7,974,794 |  |  | 7,974,794 |  | 4.21 years |  | $ | 3,280,000 |

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- Definition Tabular disclosure of the inputs and valuation techniques used to measure fair value, and a discussion of changes in valuation techniques and related inputs, if any, applied during the period to each separate class of assets, liabilities, and financial instruments classified in shareholders' equity that are measured on a recurring and/or nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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