v3.26.1
Segment information - Schedule of Reportable Segments and Reconciliation to Consolidated Net Income (Details) - Reportable Segments [Member] - USD ($)
 6 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Segment information - Schedule of Reportable Segments and Reconciliation to Consolidated Net Income (Details) [Line Items]    
Total other income, net $ 7,622 $ 16,375
Provision for income taxes (205,963) (29,752)
Net loss (1,074,093) (479,165)
Wastewater treatment related [Member]    
Segment information - Schedule of Reportable Segments and Reconciliation to Consolidated Net Income (Details) [Line Items]    
Gross profits 3,178,502 1,511,095
Operating expenses (3,825,822) (1,976,883)
Operating loss (647,320) (465,788)
Digital health and wellness related [Member]    
Segment information - Schedule of Reportable Segments and Reconciliation to Consolidated Net Income (Details) [Line Items]    
Gross profits 3,020,787 0
Operating expenses (3,249,219) 0
Operating loss (228,432) 0
Consolidated [Member]    
Segment information - Schedule of Reportable Segments and Reconciliation to Consolidated Net Income (Details) [Line Items]    
Gross profits 6,199,289 1,511,095
Operating expenses (7,075,041) (1,976,883)
Operating loss $ (875,752) $ (465,788)