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Stock-Based Compensation - Stock-Based Compensation Expense Reported in Condensed Statements of Operations (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense $ 2,360 $ 647
Research and Development    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense 1,036 164
General and Administrative    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense $ 1,324 $ 483