Tax Receivable Agreement Liability - Schedule of Tax Agreement Liability (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Jun. 30, 2025 |
|
| Tax Receivable Agreement [Roll Forward] | |||
| Beginning balance | $ 40,433 | $ 40,613 | $ 40,613 |
| Additions (reductions) to tax receivable agreement: | |||
| Exchange of LLC Units for Class A Common Stock | 26 | 167 | |
| Adjustment for change in estimated tax rate or benefits | (856) | $ 0 | (347) |
| Ending fiscal year balance | 39,603 | 40,433 | |
| Less: current portion under tax receivable agreement | (271) | (271) | |
| Ending balance | $ 39,332 | $ 40,162 | |