Net Loss Per Share (Details)
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9 Months Ended | |
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Sep. 30, 2014
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Sep. 30, 2013
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Convertible preferred stock
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Net loss per share | ||
Amounts of potentially dilutive securities that excluded from the calculation of diluted net loss per share due to their anti-dilutive effect (in shares) | 19,114,241 | |
Outstanding stock options
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Net loss per share | ||
Amounts of potentially dilutive securities that excluded from the calculation of diluted net loss per share due to their anti-dilutive effect (in shares) | 2,942,927 | 1,775,593 |
Unvested restricted stock
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Net loss per share | ||
Amounts of potentially dilutive securities that excluded from the calculation of diluted net loss per share due to their anti-dilutive effect (in shares) | 78,015 | 224,019 |