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Concentrations of Risk (Details) - manufacturer
3 Months Ended 6 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Concentration Risk [Line Items]        
Number of third-party manufacturers 107 128 107 128
Sales | Customer Concentration Risk | Walmart        
Concentration Risk [Line Items]        
Concentration risk, percentage 19.00% 19.00% 20.00% 20.00%
Sales | Customer Concentration Risk | Amazon        
Concentration Risk [Line Items]        
Concentration risk, percentage 12.00% 10.00% 13.00% 10.00%
Sales | Supplier Concentration Risk        
Concentration Risk [Line Items]        
Number of third-party manufacturers with long-term contracts     28 28
Top 5 brands | Sales | Product Concentration Risk        
Concentration Risk [Line Items]        
Concentration risk, percentage 37.00% 39.00% 38.00% 40.00%
Manufacturers | Sales | Supplier Concentration Risk        
Concentration Risk [Line Items]        
Concentration risk, percentage     76.00% 75.00%
Contract Pharmacal Corporation | Sales | Supplier Concentration Risk        
Concentration Risk [Line Items]        
Concentration risk, percentage     22.00% 21.00%