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Segment Information - Revenue by Major Customers (Details) - Revenue Benchmark [Member] - Geographic Concentration Risk [Member]
12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Customer A      
Revenue, Major Customer [Line Items]      
Concentration risk percentage 15.80% 16.30% 15.60%
Customer B      
Revenue, Major Customer [Line Items]      
Concentration risk percentage 17.50% 15.90% 15.00%