|
Net Loss Per Share Attributable to Common Stockholders - Potential Dilutive Securities Excluded from Computation of Diluted Net Loss Per Common Share (Detail)
|
6 Months Ended |
|
Jun. 30, 2014
|
Jun. 30, 2013
|
|
Options to Purchase Common Stock [Member]
|
|
|
| Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
| Potential dilutive securities excluded from computation of diluted net loss per common share |
2,524,396 |
2,375,882 |
|
Warrants to Purchase Common Stock [Member]
|
|
|
| Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
| Potential dilutive securities excluded from computation of diluted net loss per common share |
74,412 |
|
|
Warrants to Purchase Redeemable Convertible Preferred Stock [Member]
|
|
|
| Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
| Potential dilutive securities excluded from computation of diluted net loss per common share |
|
74,412 |
|
Redeemable Convertible Preferred Stock [Member]
|
|
|
| Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
| Potential dilutive securities excluded from computation of diluted net loss per common share |
|
8,738,085 |
|
Unvested Restricted Stock [Member]
|
|
|
| Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
|
|
| Potential dilutive securities excluded from computation of diluted net loss per common share |
|
107,696 |