Revenue - Additional Information (Detail1)	Apr. 26, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-04-27
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue expected to be recognized	50.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-04-25
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue expected to be recognized	25.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months