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Commitments and Contingencies - Additional Information 1 (Details) - License Agreement with Salk Institute
Jun. 30, 2021
USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]  
Payments based upon the achievement of certain regulatory milestones $ 400,000
Maximum  
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]  
Milestone payments payable $ 6,500,000