Net Loss Per Share - Antidilutive Shares (Details) - shares shares in Thousands |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
Antidilutive securities (in shares) | 9,577 | 7,007 | 9,577 | 7,007 |
Options to purchase common stock | ||||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
Antidilutive securities (in shares) | 5,888 | 2,972 | 5,888 | 2,972 |
Restricted stock | ||||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
Antidilutive securities (in shares) | 293 | 609 | 293 | 609 |
Warrants for common stock | ||||
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
Antidilutive securities (in shares) | 3,396 | 3,426 | 3,396 | 3,426 |