Revenue Recognition and Related Costs - Additional Information (Detail) - USD ($) |
6 Months Ended | |
|---|---|---|
Mar. 31, 2025 |
Sep. 30, 2024 |
|
| Disaggregation of Revenue [Line Items] | ||
| Amortization period for incremental costs | 1 year | |
| Costs and estimated earnings in excess of billings | $ 4,380,000 | $ 9,339,000 |
| Contract with Customer, Liability, Current | $ 2,796,000 | 0 |
| Contract assets collection period | 1 year | |
| Accounts receivable related to contracts with customers | $ 161,000 | 163,000 |
| Current Liabilities [Member] | ||
| Disaggregation of Revenue [Line Items] | ||
| Customer deposits related to contracts with customers | $ 5,550,000 | $ 5,018,000 |
| X | ||||||||||
- Definition Contract with customer accounts receivable. No definition available.
|
| X | ||||||||||
- Definition Costs and estimated earnings in excess of billings on uncompleted contracts current. No definition available.
|
| X | ||||||||||
- Definition Expected period for contract assets billing and collection. No definition available.
|
| X | ||||||||||
- Definition Incremental costs amortization period. No definition available.
|
| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|