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Basis of Presentation and summary of significant accounting policies - Equity method investee (Details) - USD ($)
Sep. 30, 2025
Sep. 30, 2024
Equity method investee    
Cumulative investments $ 987,000 $ 1,311,000
DMEScripts, LLC    
Equity method investee    
Cumulative investments $ 1,710,000  
Percentage of equity interest acquired 7.00%