Stock-based compensation expense - Reserved For Issuance (Details) shares in Thousands |
12 Months Ended |
|---|---|
|
Sep. 30, 2022
shares
| |
| Number Of Shares Reserved For Issuance [Roll Forward] | |
| Outstanding at September 30, 2021 (in shares) | 355 |
| Additional shares authorized (in shares) | 249 |
| Shares issued during the period (in shares) | (97) |
| Outstanding at September 30, 2022 (in shares) | 507 |
| X | ||||||||||
- Definition Number Of Shares Reserved For Issuance No definition available.
|
| X | ||||||||||
- Definition Aggregate number of common shares reserved for future issuance. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Number of additional shares authorized for issuance under share-based payment arrangement. No definition available.
|
| X | ||||||||||
- Definition Number of shares issued during the period as a result of an employee stock purchase plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|