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Stockholders' Equity (Details) - USD ($) | Jan. 02, 2024 | Dec. 02, 2022 | Mar. 31, 2024 | Sep. 30, 2023
--- | --- | --- | --- | ---
Class Of Stock [Line Items] |  |  |  |
Common stock, par value (in dollars per share) |  |  | $ 0.001 | $ 0.001
Common stock, shares authorized (in shares) |  |  | 290,000,000 | 290,000,000
Common stock, shares issued (in shares) |  |  | 124,133,000 | 107,312,000
Common stock, shares outstanding (in shares) |  |  | 124,133,000 | 107,312,000
Preferred stock, par value (in dollars per share) |  |  | $ 0.001 | $ 0.001
Preferred stock, shares authorized (in shares) |  |  | 5,000,000 | 5,000,000
Preferred stock, shares issued (in shares) |  |  | 0 | 0
Preferred stock, shares outstanding (in shares) |  |  | 0 | 0
Common stock, share reserve for issuance (in shares) |  |  | 4,553,827 |
Underwriting Agreement |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Shares of common stock issued (in shares) | 15,790,000 |  |  |
Common stock offering price (in dollars per share) | $ 28.50 |  |  |
Aggregate purchase price paid by investors | $ 450,000,000 |  |  |
Net proceeds | $ 429,300,000 |  |  |
At The Market Agreement |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Shares issued |  |  | 0 |
At The Market Agreement | Maximum |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Common stock shares value reserved for future issuance |  | $ 250,000,000 |  |
Percentage of commission to sales agent |  | 3.00% |  |
2004 Equity Incentive Plan, 2013 Equity Incentive Plan, 2021 Equity Incentive Plan and Inducement Grants |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Common stock, share reserve for issuance (in shares) |  |  | 11,723,683 | 12,709,837

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