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Significant Accounting Policies - Summarize the impact of adopting ASU 2020-06 (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Oct. 01, 2022 | Sep. 30, 2022
--- | --- | --- | ---
Summary Of Significant Accounting Policies [Line Items] |  |  |
Deferred tax assets | $ 54,387 | $ 54,452 | $ 51,989
Long-term debt, net of discounts and issuance costs | 264,687 | 270,430 | 259,436
Additional paid-in capital | 1,038,048 | 1,015,171 | 1,029,542
Accumulated deficit | $ (305,655) | (277,408) | $ (283,249)
As Previously Reported |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Deferred tax assets |  | 51,989 |
Long-term debt, net of discounts and issuance costs |  | 259,436 |
Additional paid-in capital |  | 1,029,542 |
Accumulated deficit |  | (283,249) |
Revision of Prior Period, Adjustment | ASU 2020-06 |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Deferred tax assets |  | 2,463 |
Long-term debt, net of discounts and issuance costs |  | 10,994 |
Additional paid-in capital |  | (14,371) |
Accumulated deficit |  | $ 5,841 |

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