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Concentrations of Risk (Details) - manufacturer | 12 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020
Concentration Risk [Line Items] |  |  |
Number of third-party manufacturers | 128 |  |
Sales | Product concentration risk | Top 5 brands |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 41.30% | 45.60% | 42.60%
Sales | Customer concentration risk | Walmart |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 20.50% | 21.60% | 23.10%
Sales | Supplier concentration risk |  |  |
Concentration Risk [Line Items] |  |  |
Number of third-party manufacturers with long-term contracts | 23 | 19 |
Sales | Supplier concentration risk | Manufactures |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 69.00% | 70.50% |
Accounts receivable | Customer concentration risk | Walmart |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk, percentage | 22.10% |  |

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