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Commitments and Contingencies - Summary of Operating Leases for Office and/or Manufacturing Space (Detail)	12 Months Ended
	Apr. 30, 2018
Bentonville, Arkansas | September 25, 2018
Schedule Of Commitments And Contingencies [Line Items]
Lease Expiration Date	Sep. 25, 2018
Jacksonville, Florida | December 31, 2018
Schedule Of Commitments And Contingencies [Line Items]
Lease Expiration Date	Dec. 31, 2018
Columbia. Missouri | February 28, 2019
Schedule Of Commitments And Contingencies [Line Items]
Lease Expiration Date	Feb. 28, 2019
Columbia. Missouri | April 30, 2019
Schedule Of Commitments And Contingencies [Line Items]
Lease Expiration Date	Apr. 30, 2019
Columbia. Missouri | April 30, 2023
Schedule Of Commitments And Contingencies [Line Items]
Lease Expiration Date	Apr. 30, 2023
Shenzen, China | February 28, 2019
Schedule Of Commitments And Contingencies [Line Items]
Lease Expiration Date	Feb. 28, 2019
Scottsdale, Arizona | April 30, 2021
Schedule Of Commitments And Contingencies [Line Items]
Lease Expiration Date	Apr. 30, 2021
Wilsonville, Oregon | October 31, 2022
Schedule Of Commitments And Contingencies [Line Items]
Lease Expiration Date	Oct. 31, 2022
Deep River, Connecticut | May 4, 2024
Schedule Of Commitments And Contingencies [Line Items]
Lease Expiration Date	May 04, 2024
Meridian, Idaho | November 30, 2027
Schedule Of Commitments And Contingencies [Line Items]
Lease Expiration Date	Nov. 30, 2027

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