Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation - Summary of Stock Option Activity (Details)

v3.20.1
Stock-based Compensation - Summary of Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]      
Options Outstanding 1,320,197 1,126,722  
Options granted 1,635,853 458,156  
Options exercised (95,739) (15,475)  
Options forfeited (186,266) (249,206)  
Options cancelled (28,331)    
Options Outstanding 2,645,714 1,320,197 1,126,722
Options Vested and expected to vest at December 31, 2019 2,645,714    
Options Vested at December 31, 2019 1,058,169    
Outstanding, Weighted average exercise price per share $ 0.77 $ 0.68  
Options granted, Weighted average exercise price per share 5.94 0.90  
Options exercised, Weighted average exercise price per share 0.85 1.12  
Options forfeited, Weighted average exercise price per share 7.02 0.61  
Options cancelled, Weighted average exercise price per share 2.72    
Outstanding, Weighted average exercise price per share 3.50 $ 0.77 $ 0.68
Vested and expected to vest at December 31, 2019, Weighted average exercise price per share 3.50    
Vested at December 31, 2019, Weighted average exercise price per share $ 2.80    
Outstanding, Weighted average remaining contractual life (in years) 8 years 6 months 3 days 7 years 11 months 26 days 8 years 1 month 20 days
Vested and expected to vest at December 31, 2019, Weighted average remaining contractual life (in years) 8 years 6 months 3 days    
Vested at December 31, 2019, Weighted average remaining contractual life (in years) 7 years 18 days    
Outstanding, Aggregate Intrinsic Value $ 4,184 $ 8,465 $ 470
Vested and expected to vest at December 31, 2019, Aggregate Intrinsic Value 4,184    
Vested at December 31, 2019, Aggregate Intrinsic Value $ 2,431