Contracts Receivable Including Retainage, net - Rollforward of Allowance (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2024 |
Sep. 30, 2023 |
Sep. 30, 2022 |
|
| Allowance for Doubtful Accounts Receivable [Roll Forward] | |||
| Balance at beginning of period | $ 906 | $ 612 | $ 1,926 |
| Charged (credited) to bad debt expense | 491 | 456 | (947) |
| Write-off of contracts receivable including retainage | (324) | (162) | (367) |
| Balance at end of period | $ 1,073 | $ 906 | $ 612 |
| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Amount of direct write-downs of accounts receivable charged against the allowance. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|