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Stock-Based Compensation - Summary of Grants of Performance-Based Restricted Stock Units Associated with Senior Executives and Key Employees (Detail) - Performance-Based Restricted Stock Units [Member] - $ / shares
3 Months Ended
Jul. 18, 2019
Aug. 02, 2018
Aug. 02, 2020
Senior Executives [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance-Based Restricted Stock Units Awarded 93,653 [1],[2] 86,599 [1],[2] 0
Price Per Share [2] $ 19.04 [3] $ 18.51 [4]  
Vesting Period [2] 3 years 3 years  
Key Employees [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance-Based Restricted Stock Units Awarded 29,227 [1],[5] 47,800 [1],[5] 0
Price Per Share [5],[6] $ 18.49 $ 24.35  
Vesting Period [5] 3 years 3 years  
[1] Amounts represent the maximum number of common stock shares that could be earned if certain performance targets are met as defined in the related restricted stock unit agreements.
[2] Performance-based restricted stock units awarded to certain senior executives.
[3] Price per share represents the fair market value per share ($1.03 per $1 or an increase of $0.55 to the closing price of our common stock on the date of grant) determined using the Monte Carlo simulation model for the market-based total shareholder return component and the closing price of our common stock ($18.49) for the performance-based component of the performance-based restricted stock units granted to certain senior executives on July 18, 2019.
[4] Price per share represents the fair market value per share ($0.76 per $1 or a reduction of $5.84 to the closing price of the common stock on the date of grant) determined using the Monte Carlo simulation model for the market-based total shareholder return component and the closing price of our common stock ($24.35) for the performance-based component of the performance-based restricted stock units granted to certain senior executives on August 2, 2018.
[5] Performance-based restricted stock units awarded to key employees.
[6] Price per share represents the closing price of our common stock on the date of grant.