Retirement Plan - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Sep. 30, 2022 |
Sep. 30, 2021 |
|
| Defined Contribution Plan Disclosure [Line Items] | ||
| Defined contribution plan employer discretionary contribution | $ 0.2 | $ 0.2 |
| Defined contribution plan description | Employees are eligible to participate if they are over 21 years of age and have completed a minimum of one month of service with at least 80 hours worked in that month. | |
| Defined contribution plan employee eligibility age | 21 years | |
| Defined contribution plan minimum eligible service months | 1 month | |
| Defined contribution plan minimum eligible service hours | 80 hours | |
| Defined contribution plan name | 401(k) retirement plan | |
| Discretionary Contributions [Member] | ||
| Defined Contribution Plan Disclosure [Line Items] | ||
| Defined contribution plan description | To be eligible for the discretionary profit-sharing contribution, an employee must be eligible to participate in the 401(k) retirement plan and must complete at least 501 hours of service during the calendar year or be employed as of the last day of the calendar year. | |
| Defined contribution plan minimum eligible service hours in each month | 501 hours | |