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Net Loss per Common Share | 3 Months Ended
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Mar. 31, 2015
Earnings Per Share [Abstract] |
Earnings Per Share [Text Block] | 4. Net Loss per Common Share 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) |
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 The entire disclosure for earnings per share. + 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 (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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