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Related Parties
9 Months Ended
Sep. 30, 2021
Related Party Transactions [Abstract]  
Related Parties

15. Related Parties

During the nine months ended September 30, 2021 and 2020, the Company incurred $0.4 million and $0.3 million in expenses to a stockholder that provided research and development related services. Of these amounts, $0.01 and $0.1 million were in accrued expenses as of September 30, 2021 and 2020.