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Stock-Based Compensation - Summary of Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Number of Shares    
Outstanding 4,543,318  
Granted 813,000  
Exercised (46,807)  
Forfeited/Cancelled (161,565)  
Outstanding 5,147,946 4,543,318
Exercisable 2,707,703  
Vested and expected to vest 5,147,946  
Weighted Average Exercise Price Per Share    
Outstanding $ 8.52  
Granted 26.84  
Exercised 6.76  
Forfeited/Cancelled 13.76  
Outstanding 11.26 $ 8.52
Exercisable 6.87  
Vested and expected to vest $ 11.26  
Weighted Average Remaining Contractual Term    
Outstanding 6 years 11 months 26 days 7 years 2 months 19 days
Exercisable 5 years 5 months 15 days  
Vested and expected to vest 6 years 11 months 26 days  
Aggregate Intrinsic Value    
Outstanding $ 29,108 $ 108,048
Exercisable 22,236  
Vested and expected to vest $ 29,108