Share-based compensation - Share-based Compensation Expense (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
|
| Total share-based compensation expense included in the consolidated statements of operations | ||||
| Total share-based compensation expense | $ 2,072 | $ 2,439 | $ 4,757 | $ 4,541 |
| Research and development | ||||
| Total share-based compensation expense included in the consolidated statements of operations | ||||
| Total share-based compensation expense | 871 | 1,376 | 2,229 | 2,268 |
| General and administrative | ||||
| Total share-based compensation expense included in the consolidated statements of operations | ||||
| Total share-based compensation expense | $ 1,201 | $ 1,063 | $ 2,528 | $ 2,273 |
| X | ||||||||||
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|