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Stock-Based Compensation - Summary of Granted and Outstanding Awards (Details) - shares | Sep. 30, 2025 | Sep. 30, 2024
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Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Options (in shares) | 1,407,035 | 1,978,516
Total (in shares) | 7,217,386 |
2013 Plan |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Options (in shares) | 776,279 |
Total (in shares) | 2,276,279 |
2021 Plan |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Options (in shares) | 32,151 |
Total (in shares) | 3,782,222 |
Inducement Awards |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Options (in shares) | 598,605 |
Total (in shares) | 1,158,885 |
Restricted stock units |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Restricted stock units (in shares) | 5,810,351 | 4,913,312
Restricted stock units | 2013 Plan |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Restricted stock units (in shares) | 1,500,000 |
Restricted stock units | 2021 Plan |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Restricted stock units (in shares) | 3,750,071 |
Restricted stock units | Inducement Awards |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Restricted stock units (in shares) | 560,280 |

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