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Commitments and Contingencies - Additional Information (Details) - USD ($)
 1 Months Ended 12 Months Ended
Apr. 30, 2020
Mar. 31, 2020
Feb. 28, 2019
Dec. 31, 2020
Maximum | Research and Development Service Agreement        
Commitments And Contingencies Disclosure [Line Items]        
Potential milestone payments achieved       $ 1,750,000
Termination payments       $ 500,000
MDACC | Preclinical Studies and Clinical Trials        
Commitments And Contingencies Disclosure [Line Items]        
Contractual obligation   $ 10,000,000    
Contractual obligation period   5 years    
Contractual obligation paid $ 2,000,000      
Broad Institute, Inc. | Specialty Screening Services        
Commitments And Contingencies Disclosure [Line Items]        
Contractual obligation     $ 1,500,000  
Contractual obligation period     3 years  
Contractual obligation per year     $ 500,000