Stock-Based Compensation - Time Based Restricted Stock Unit Activity (Detail) - Time Vested Restricted Stock Awards [Member] - shares		12 Months Ended
		Apr. 28, 2024	Apr. 30, 2023	May 01, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
outstanding at beginning of year		285,826	210,284	174,295
granted		174,753	119,687	37,991
vested	[1]	(151,652)	(32,799)
forfeited			(11,346)	(2,002)
outstanding at end of year		308,927	285,826	210,284

[1] During fiscal 2024, time-based restricted stock units totaling 151,652 vested at a fair value of $857,000, or $5.65 per share. During fiscal 2023, time-based restricted stock units totaling 32,799 vested at a fair value of $167,000, or $5.10 per share.