Annual report pursuant to Section 13 and 15(d)

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

v3.20.4
Share-Based Compensation - Summary of Share-based Compensation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Research and Development Expense      
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]      
Share-based compensation expense $ 754 $ 723 $ 398
General and Administrative Expense      
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]      
Share-based compensation expense $ 2,005 $ 1,450 $ 892