Significant Accounting Policies - Accounts Receivables by Type (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	$ 108,028	$ 79,698
Credit Card Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	57,724	28,471
Vendor Rebates
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	40,045	40,222
Other Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	$ 10,259	$ 11,005