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Related Parties - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
NMDP Be The Match      
Related Party Transaction [Line Items]      
Expenses paid to related party   $ 100,000  
Amounts owed to related party $ 0    
Maximum [Member] | ImmunoGen      
Related Party Transaction [Line Items]      
Expenses paid to related party 100,000    
Amounts owed to related party 100,000   $ 100,000
Maximum [Member] | NMDP Be The Match      
Related Party Transaction [Line Items]      
Expenses paid to related party $ 100,000    
Accounts Payable, Accrued Expenses and Other Current Liabilities [Member] | NMDP Be The Match      
Related Party Transaction [Line Items]      
Amounts owed to related party     $ 100,000