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Customer Receivables (Components Of Customer Receivables) (Details) - USD ($) $ in Thousands | Apr. 30, 2020 | Apr. 30, 2019
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Receivables [Abstract] |  |
Gross customer receivables | $ 112,528 | $ 132,145
Allowance for doubtful accounts | (472) | (249)
Allowance for returns and discounts | (5,712) | (5,995)
Net customer receivables | $ 106,344 | $ 125,901

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- Definition Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4531-111522 + Details
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