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Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Operating Loss Carryforwards [Line Items]      
Increase in valuation allowance $ 108,900 $ 75,000  
Current tax provision 100 1,400 $ 3,400
Uncertain tax positions 0 0  
Interest or penalties for unrecognized tax benefits since inception 0    
Massachusetts      
Operating Loss Carryforwards [Line Items]      
Tax credits $ 32,700 $ 19,500  
Tax credits expiration starting year 2038 2037  
Federal      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforwards $ 181,500 $ 16,600  
Tax credits $ 61,700 $ 41,300  
Tax credits expiration starting year 2043 2042