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Concentrations of Risk (Details) - manufacturer
3 Months Ended 9 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Concentration Risk [Line Items]        
Number of third-party manufacturers 102 129 102 129
Sales | Customer Concentration Risk | Walmart        
Concentration Risk [Line Items]        
Concentration risk, percentage 20.00% 19.00% 20.00% 20.00%
Sales | Customer Concentration Risk | Amazon        
Concentration Risk [Line Items]        
Concentration risk, percentage 12.00% 11.00% 12.00% 10.00%
Sales | Supplier Concentration Risk        
Concentration Risk [Line Items]        
Number of third-party manufacturers with long-term contracts     27 27
Top 5 brands | Sales | Product Concentration Risk        
Concentration Risk [Line Items]        
Concentration risk, percentage 38.00% 37.00% 37.00% 38.00%
Manufacturers | Sales | Supplier Concentration Risk        
Concentration Risk [Line Items]        
Concentration risk, percentage     73.00% 72.00%
Contract Pharmacal Corporation | Sales | Supplier Concentration Risk        
Concentration Risk [Line Items]        
Concentration risk, percentage     21.00% 20.00%