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Supplementary Financial Data (unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract] |
Summary of Selected Quarterly Financial Data | The following table presents the selected quarterly financial data for the years ended December 31, 2016 and 2015:
|  | Consolidated Statements of Operations |
|  | Quarter Ended |
|  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
|  | (In thousands, except per share amounts) |
2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss from operations |  | $ | (7,040 | ) |  | $ | (7,091 | ) |  | $ | (7,138 | ) |  | $ | (11,397 | )
Net loss |  | $ | (11,747 | ) |  | $ | (7,098 | ) |  | $ | (7,084 | ) |  | $ | (11,248 | )
Net loss per share of common stock attributable to common stockholders, basic and diluted |  | $ | (40.96 | ) |  | $ | (19.07 | ) |  | $ | (0.87 | ) |  | $ | (0.67 | )
2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss from operations |  | $ | (2,689 | ) |  | $ | (3,083 | ) |  | $ | (4,021 | ) |  | $ | (5,001 | )
Net loss |  | $ | (2,697 | ) |  | $ | (3,219 | ) |  | $ | (3,449 | ) |  | $ | (5,493 | )
Net loss per share of common stock attributable to common stockholders, basic and diluted |  | $ | (11.75 | ) |  | $ | (13.78 | ) |  | $ | (12.79 | ) |  | $ | (20.31 | )

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, 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=68076893&loc=d3e1280-108306 + Details
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