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Net Loss per Common Share (Tables) | 3 Months Ended
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Mar. 31, 2015
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table sets forth the computation of basic and diluted net income (loss) per share for the periods indicated:
|  | Three Months Ended |
|  | March 31, |
|  | 2015 |  |  | 2014 |
Basic and diluted net loss per common share calculation: |  |  |  |  |  |
Net loss and comprehensive loss |  | $ | (14,493,000) |  |  | $ | (11,307,000) |
Accretion of redeemable convertible preferred stock |  | (338,000) |  |  | (314,000) |
Net loss attributable to common stockholders |  | $ | (14,831,000) |  |  | $ | (11,621,000) |
Weighted average common shares outstanding |  | 212,290,406 |  |  | 182,535,562 |
Net loss per share of common stock—basic and diluted |  | $ | (0.07) |  |  | $ | (0.06) |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] | The following outstanding securities at March 31, 2015 and 2014 have been excluded from the computation of diluted weighted shares outstanding, as they would have been anti-dilutive:
|  | March 31, |  | March 31, |
|  | 2015 |  | 2014 |
Options |  |  | 2,127,310 |  |  | 1,235,172 |
Warrants |  |  | 10,655,502 |  |  | 30,857,698 |
Series B redeemable convertible preferred stock |  |  | 86,710,400 |  |  | 88,599,780 |
Escrow |  |  | — |  |  | 12,000,000 |
Total |  |  | 99,493,212 |  |  | 132,692,650 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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