Summary of significant accounting policies (Details) |
6 Months Ended |
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Mar. 31, 2026 | |
| Properties [Member] | |
| Property, Plant, and Equipment [Line Items] | |
| Property plant and equipmment useful life | 30 years |
| Automobiles [Member] | |
| Property, Plant, and Equipment [Line Items] | |
| Property plant and equipmment useful life | 10 years |
| Leasehold Improvements [Member] | |
| Property, Plant, and Equipment [Line Items] | |
| Property plant and equipmment useful life | Over shorter of the lease term and the remining useful life |
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- References No definition available.
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- 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/2009/role/commonPracticeRef
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- Definition Useful life of property, plant, and equipment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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