Annual report pursuant to Section 13 and 15(d)

Equity Incentive Plans, Employee Stock Purchase Plan and Stock-Based Compensation - Schedule of Stock-Based Compensation Expense Recognized (Details)

v3.20.1
Equity Incentive Plans, Employee Stock Purchase Plan and Stock-Based Compensation - Schedule of Stock-Based Compensation Expense Recognized (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]      
Total stock-based compensation expense $ 10,312 $ 2,872 $ 1,391
Research and Development      
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]      
Total stock-based compensation expense 1,915 619 119
General and Administrative      
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]      
Total stock-based compensation expense $ 8,397 $ 2,253 $ 1,272