Share-Based Compensation - Allocation of Share-based Compensation Expense on Statements of Operations (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
|
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||||
Total share-based compensation expense | $ 595 | $ 42 | $ 1,014 | $ 84 |
Research and development | ||||
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||||
Total share-based compensation expense | 257 | 5 | 380 | 17 |
General and administrative | ||||
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||||
Total share-based compensation expense | $ 338 | $ 37 | $ 634 | $ 67 |