Stock-Based Compensation - Narrative (Detail) - USD ($)								3 Months Ended
		Jul. 03, 2023	Aug. 10, 2022		Jul. 01, 2022	Jul. 22, 2021		Jul. 30, 2023	Jul. 31, 2022	Sep. 16, 2015
Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, vested								0
Share-based compensation expense								$ 0
Performance Based Restricted Stock Units [Member] | Senior Executives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, granted			178,714	[1],[2]		122,476	[1],[2]	0	0
Share-based compensation award, vested	[3]								545
Price Per Share	[2]		$ 5.77	[4]		$ 15.93	[5]
Performance Based Restricted Stock Units [Member] | Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, granted						20,500	[1],[6]	0	0
Share-based compensation award, vested	[7]								437
Price Per Share	[6],[8]					$ 14.75
Performance Based Restricted Stock Units [Member] | Selling, General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense									$ 2,000
Time-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, vested								0
Remaining unrecognized compensation expense								$ 484,000
Weighted average period over which unrecognized compensation expense is expected to be recognized								1 year 8 months 12 days
Fair value of units expected to vest								$ 1,600,000
Time-Based Restricted Stock Units [Member] | Senior Executives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, vested	[9]								19,786
Time-Based Restricted Stock Units [Member] | Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, vested	[10]								13,013
Time-Based Restricted Stock Units [Member] | Selling, General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense								238,000	$ 166,000
Common Stock Awards [Member] | Outside Directors [Member] | Immediate Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award, granted		16,616			19,753
Price Per Share		$ 5.04			$ 4.24
Common Stock Awards [Member] | Selling, General and Administrative Expenses [Member] | Outside Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense								$ 84,000	$ 84,000
2015 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock authorized for issuance										1,200,000
Number of shares available for future equity based grants								207,650

[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] Performance-based restricted stock units vested by senior executives.

[4] Price per share represents the fair market value per share ($1.14 per $1, or an increase of $0.71 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 ($5.06) for the performance-based component of the performance-based restricted stock units granted to senior executives on August 10, 2022.

[5] 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.

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

[7] Performance-based restricted stock units vested by key employees.

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

[9] Time-based restricted stock units vested by senior executives.

[10] Time-based restricted stock units vested by key employees.