Stock-Based Compensation - Summary of Option Activity (Details) |
3 Months Ended |
|---|---|
|
Mar. 31, 2017
USD ($)
$ / shares
shares
| |
| Number of shares | |
| Balance, beginning of period (in shares) | shares | 1,849,359 |
| Granted (in shares) | shares | 219,019 |
| Forfeited (in shares) | shares | (12,142) |
| Balance, end of period (in shares) | shares | 2,056,236 |
| Exercisable (in shares) | shares | 1,102,091 |
| Weighted‑average exercise price | |
| Beginning of period (usd per share) | $ / shares | $ 5.57 |
| Granted (usd per share) | $ / shares | 0.81 |
| Forfeited (usd per share) | $ / shares | 5.44 |
| End of period (usd per share) | $ / shares | 5.06 |
| Exercisable (usd per share) | $ / shares | $ 6.12 |
| Fair value of options granted | |
| Granted | $ | $ 134,838 |
| Weighted average remaining contractual term (in years) | |
| Balance, end of period | 8 years 3 months 26 days |
| Exercisable | 7 years 8 months 9 days |
| X | ||||||||||
- Definition Represents the information pertaining to share based compensation arrangement by share based payment award options grants in period fair value. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
|
| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
|
| X | ||||||||||
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
|
| X | ||||||||||
- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|