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Stock-Based Compensation - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Feb. 28, 2019
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Mar. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Share-based compensation expenses capitalized amount   $ 45,000   $ 259,000      
Number of shares granted for new options       0      
Shares available for issuance   2,685,328   2,685,328   1,704,244  
Stock-based compensation       $ 7,108,000 $ 2,336,000    
Restricted Stock Units              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Vesting period       4 years      
Share-based compensation vesting rights, terms       The RSUs generally vest over a four-year period with straight-line annual vesting,      
2019 Equity Incentive Plan              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Common stock reserved for issuance 2,000,430            
Start date for automatic annual increase for common stock reserved for issuance under plan Jan. 01, 2020            
End date for automatic annual increase for common stock reserved for issuance under plan Jan. 01, 2028            
Automatic annual increase in common stock reserved for issuance 3.00%            
Shares available for issuance   2,685,328   2,685,328      
2019 Employee Stock Purchase Plan              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Common stock reserved for issuance             300,650
Start date for automatic annual increase for common stock reserved for issuance under plan Jan. 01, 2020            
End date for automatic annual increase for common stock reserved for issuance under plan Jan. 01, 2028            
Automatic annual increase in common stock reserved for issuance 1.00%            
Shares available for issuance   562,486   562,486      
Purchase shares of common stock, price per share, percentage of fair market value       85.00%      
Stock-based compensation   $ 118,000 $ 64,000 $ 516,000 $ 64,000