Stock-Based Compensation - Expenses Included in Operating Expenses (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Mar. 31, 2024 |
Mar. 31, 2023 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
Stock-based compensation expense | $ 16,588 | $ 20,613 | $ 34,273 | $ 40,002 |
Research and development | ||||
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
Stock-based compensation expense | 7,097 | 8,745 | 15,413 | 17,147 |
General and administrative expense | ||||
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
Stock-based compensation expense | $ 9,491 | $ 11,868 | $ 18,860 | $ 22,855 |