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Customer-Funded Research & Development (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Oct. 31, 2020 | Oct. 26, 2019 | Oct. 31, 2020 | Oct. 26, 2019
Customer-Funded Research & Development |  |  |  |
Revenue from customer funded research and development | $ 20,742 | $ 17,506 | $ 44,168 | $ 32,626

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- Definition The amount of compensation earned (contract income) under a research and development arrangement accounted for as a contract to perform research and development for others. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6420387&loc=d3e23221-108380 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6420387&loc=d3e23199-108380 + Details
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