Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Summary of Share-based Compensation Expense (Details)

v3.10.0.1
Share-Based Compensation - Summary of Share-based Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Research and Development Expense        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Share-based compensation expense $ 118 $ 42 $ 197 $ 85
General and Administrative Expense        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Share-based compensation expense $ 149 $ 48 $ 207 $ 95