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Description of Business (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Nov. 30, 2019
Subsidiary, Sale of Stock [Line Items]      
Stock issuance, maximum compensation due to third party (as a percent of stock sales)     3.00%
Cash and cash equivalents and marketable securities $ 497,700    
Accumulated deficit $ (1,473,988) $ (1,235,980)  
ATM offering      
Subsidiary, Sale of Stock [Line Items]      
Shares sold in transaction (in shares) 20,894,565    
Gross proceeds from sale of stock $ 91,100