Note 14 - Stock-based Compensation - Restricted Stock Weighted Average Grant Date Fair Value (Details) - $ / shares |
3 Months Ended | 9 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Jun. 30, 2023 |
Jun. 30, 2022 |
Jun. 30, 2023 |
Jun. 30, 2022 |
Sep. 30, 2022 |
Sep. 30, 2021 |
|
| Non Vested at September 30, 2021 and 2020 (in dollars per share) | $ 0 | $ 20.00 | $ 18.00 | $ 20.00 | $ 20.00 | $ 0 |
| Awarded (in dollars per share) | 20.00 | 26.00 | ||||
| Vested (in dollars per share) | (20.00) | (26.00) | ||||
| Vested (in dollars per share) | 0 | (20.00) | (32.00) | |||
| Forfeited (in dollars per share) | 0 | |||||
| Non Vested at September 30, 2022 and 2021 (in dollars per share) | $ 0 | $ 20.00 | $ 0 | $ 20.00 | $ 18.00 | $ 20.00 |
| X | ||||||||||
- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|