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Stock-Based Compensation - Schedule of stock-based compensation expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense $ 5,467 $ 1,266
Research and development    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense 2,200 531
General and administrative    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense $ 3,267 $ 735