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Segment Geographic and Significant Customer Information - Schedule of Net Accounts Receivable from Significant Customers (Detail) - Accounts Receivable - Credit Concentration Risk | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 26, 2018 | Apr. 28, 2017
Arrow Electronics, Inc. |  |
Segment Reporting Information [Line Items] |  |
Percentage of net accounts receivable | 11.00% | 15.00%
Tech Data Corporation |  |
Segment Reporting Information [Line Items] |  |
Percentage of net accounts receivable | 11.00% | 14.00%

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