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Significant Accounting Policies - Summary of Percentage on Timing of Revenue Recognition by Reportable Segment (Details)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Retail Operations [Member]
Disaggregation Of Revenue [Line Items]
Revenue	100.00%	100.00%	100.00%
Product Manufacturing [Member]
Disaggregation Of Revenue [Line Items]
Revenue	100.00%	100.00%	100.00%
Goods and Services Transferred at a Point in Time [Member] | Retail Operations [Member]
Disaggregation Of Revenue [Line Items]
Revenue	86.60%	87.60%	87.20%
Goods and Services Transferred at a Point in Time [Member] | Product Manufacturing [Member]
Disaggregation Of Revenue [Line Items]
Revenue	100.00%	100.00%	100.00%
Goods and Services Transferred Over Time [Member] | Retail Operations [Member]
Disaggregation Of Revenue [Line Items]
Revenue	13.40%	12.40%	12.80%

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+ References

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