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		Jul. 18, 2019		Aug. 02, 2018		Jul. 13, 2017
Senior Executives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Units Awarded	[1],[2]	93,653		86,599		60,504
Restricted Stock Units Expected to Vest	[2],[3]					3,277
Price Per Share	[2]	$ 19.04	[4]	$ 18.51	[5]	$ 31.85	[6]
Vesting Period	[2]	3 years		3 years		3 years
Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Units Awarded	[1],[7]	29,227		47,800		37,600
Restricted Stock Units Expected to Vest	[3],[7]					4,365
Price Per Share	[7],[8]	$ 18.49		$ 24.35		$ 32.50
Vesting Period	[7]	3 years		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] Compensation cost is based on an assessment each reporting period of the probability that certain performance goals will be met and in turn, the number of shares that are expected to be awarded during the vesting period. These amounts represent the number of shares that are expected to vest based on our assessment as of May 3, 2020.

[4] 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.

[5] 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 our common stock) 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.

[6] Price per share represents the fair market value per share ($0.98 per $1 or a reduction of $0.65 to the closing price of our common stock) determined using the Monte Carlo simulation model for the market-based total shareholder return component and the closing price of our common stock ($32.50) for the performance-based component of the performance-based restricted stock units granted to certain senior executives on July 13, 2017.

[7] Performance-based restricted stock units awarded to key employees.

[8] Price per share represents the closing price of our common stock on the date of grant.