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Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Financial Data | The following table summarizes the unaudited quarterly financial data for the last two fiscal years:
CONSOLIDATED STATEMENTS OF OPERATIONS (in thousands, except share data and per share data) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Year Ended December 31, 2014 |
|  | First Quarter |  |  | Second Quarter |  |  | Third Quarter |  |  | Fourth Quarter |
Revenue |  | $ | 47 |  |  | $ | 33 |  |  | $ | — |  |  | $ | — |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research and development |  |  | 1,495 |  |  |  | 2,648 |  |  |  | 2,928 |  |  |  | 4,701 |
General and administrative |  |  | 1,510 |  |  |  | 2,029 |  |  |  | 2,441 |  |  |  | 2,607 |
Total operating expenses |  |  | 3,005 |  |  |  | 4,677 |  |  |  | 5,369 |  |  |  | 7,308 |
Other income (expense): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  | 1 |  |  |  | 2 |  |  |  | 2 |  |  |  | 4 |
Interest expense |  |  | (461 | ) |  |  | (268 | ) |  |  | (191 | ) |  |  | (163 | )
Loss on extinguishment of debt |  |  | — |  |  |  | (2,493 | ) |  |  | — |  |  |  | — |
Decrease in value of preferred stock warrant liability |  |  | 504 |  |  |  | — |  |  |  | — |  |  |  | — |
Total other income (expense) — net |  |  | 44 |  |  |  | (2,759 | ) |  |  | (189 | ) |  |  | (159 | )
Net loss attributable to common stockholders |  | $ | (2,914 | ) |  | $ | (7,403 | ) |  | $ | (5,558 | ) |  | $ | (7,467 | )
Net loss per share attributable to common stockholders: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted |  | $ | (3.70 | ) |  | $ | (0.44 | ) |  | $ | (0.28 | ) |  | $ | (0.37 | )
Weighted-average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted |  |  | 786,986 |  |  |  | 16,883,716 |  |  |  | 20,124,574 |  |  |  | 20,125,009 |
|  | Year Ended December 31, 2013 |
|  | First Quarter |  |  | Second Quarter |  |  | Third Quarter |  |  | Fourth Quarter |
Revenue |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 6 |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research and development |  |  | 3,479 |  |  |  | 3,195 |  |  |  | 1,586 |  |  |  | 1,440 |
General and administrative |  |  | 1,972 |  |  |  | 1,392 |  |  |  | 1,227 |  |  |  | 1,575 |
Total operating expenses |  |  | 5,451 |  |  |  | 4,587 |  |  |  | 2,813 |  |  |  | 3,015 |
Other income (expense): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  | 1 |  |  |  | — |  |  |  | — |  |  |  | 1 |
Interest expense |  |  | (353 | ) |  |  | (326 | ) |  |  | (378 | ) |  |  | (430 | )
Loss on extinguishment of debt |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Decrease in value of preferred stock warrant liability |  |  | 231 |  |  |  | 20 |  |  |  | (7 | ) |  |  | (42 | )
Total other income (expense) — net |  |  | (121 | ) |  |  | (306 | ) |  |  | (385 | ) |  |  | (471 | )
Net loss attributable to common stockholders |  | $ | (5,572 | ) |  | $ | (4,893 | ) |  | $ | (3,198 | ) |  | $ | (3,480 | )
Net loss per share attributable to common stockholders: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted |  | $ | (9.09 | ) |  | $ | (7.96 | ) |  | $ | (4.40 | ) |  | $ | (4.45 | )
Weighted-average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted |  |  | 612,836 |  |  |  | 614,662 |  |  |  | 726,987 |  |  |  | 782,335 |

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=35737889&loc=d3e1280-108306 + Details
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