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. 22, 2021	Jul. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-Based Restricted Stock Units Awarded			0
Senior Executives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-Based Restricted Stock Units Awarded	[1],[2]	122,476
Price Per Share	[2],[3]	$ 15.93
Vesting Period	[2]	3 years
Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-Based Restricted Stock Units Awarded	[1],[4]	20,500
Price Per Share	[4],[5]	$ 14.75
Vesting Period	[4]	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 senior executives.

[3] Price per share represents the fair market value per share ($1.08 per $1, or an increase of $1.18 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 ($14.75) for the performance-based component of the performance-based restricted stock units granted to senior executives on July 22, 2021.

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

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