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Concentrations of Risk (Details)
3 Months Ended 6 Months Ended
Sep. 30, 2025
manufacturer
distribution_center
Sep. 30, 2024
manufacturer
Sep. 30, 2025
manufacturer
distribution_center
Sep. 30, 2024
manufacturer
Concentration Risk [Line Items]        
Number of distribution centers | distribution_center 1   1  
Number of third-party manufacturers 101 107 101 107
Sales | Supplier Concentration Risk        
Concentration Risk [Line Items]        
Number of third-party manufacturers with long-term contracts     17 28
Manufacturers | Sales | Supplier Concentration Risk        
Concentration Risk [Line Items]        
Concentration risk, percentage     57.00% 76.00%
Contract Pharmacal Corporation | Sales | Supplier Concentration Risk        
Concentration Risk [Line Items]        
Concentration risk, percentage     22.00% 23.00%
Top 5 brands | Sales | Product Concentration Risk        
Concentration Risk [Line Items]        
Concentration risk, percentage 37.00% 37.00% 38.00% 38.00%
Walmart | Sales | Customer Concentration Risk        
Concentration Risk [Line Items]        
Concentration risk, percentage 20.00% 19.00% 21.00% 20.00%
Amazon | Sales | Customer Concentration Risk        
Concentration Risk [Line Items]        
Concentration risk, percentage 13.00% 12.00% 12.00% 13.00%