Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Summary of Activity under Stock Option Plans and Related Information (Details)

v3.20.2
Stock-Based Compensation - Summary of Activity under Stock Option Plans and Related Information (Details)
$ / shares in Units, $ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2020
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
$ / shares
shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]    
Number of options outstanding, Outstanding, Beginning balance | shares 3,107,066  
Number of options outstanding, Options granted | shares 1,436,376  
Number of options outstanding, Options exercised | shares (19,020)  
Number of options outstanding, Options cancelled | shares (64,500)  
Number of options outstanding, Outstanding, Ending balance | shares 4,459,922 3,107,066
Number of options outstanding, options vested and exercisable | shares 2,179,338  
Weighted average exercise price, Outstanding, Beginning balance | $ / shares $ 7.19  
Weighted average exercise price, Options granted | $ / shares 3.80  
Weighted average exercise price, Options exercised | $ / shares 0.90  
Weighted average exercise price, Options cancelled | $ / shares 7.71  
Weighted average exercise price, Outstanding, Ending balance | $ / shares 6.12 $ 7.19
Weighted average exercise price, options vested and exercisable | $ / shares $ 5.44  
Weighted average remaining contractual term, (Years) Outstanding, Beginning balance 8 years 8 years 2 months 12 days
Weighted average remaining contractual term, (Years) options vested and exercisable 7 years 2 months 12 days  
Aggregate intrinsic value, Outstanding, Beginning balance | $ $ 3,151  
Aggregate intrinsic value, Options exercised | $ 74  
Aggregate intrinsic value, Outstanding, Ending balance | $ 6,087 $ 3,151
Aggregate intrinsic value, options vested and exercisable | $ $ 3,879