Income Taxes - (Loss) Income before Income Taxes Related to Foreign and U.S. Operations (Detail) - USD ($)	12 Months Ended
	Apr. 28, 2024	Apr. 30, 2023	May 01, 2022
Income Taxes [Line Items]
income (loss) before income taxes, foreign	$ 7,844,000	$ 5,095,000	$ 7,320,000
loss before income taxes	(10,770,000)	(28,390,000)	(325,000)
China [Member]
Income Taxes [Line Items]
income (loss) before income taxes, foreign	9,091,000	7,062,000	6,998,000
Canada [Member]
Income Taxes [Line Items]
income (loss) before income taxes, foreign	902,000	1,516,000	1,302,000
Haiti [Member]
Income Taxes [Line Items]
income (loss) before income taxes, foreign	(2,127,000)	(3,483,000)	(980,000)
Vietnam [Member]
Income Taxes [Line Items]
income (loss) before income taxes, foreign	(22,000)	0	0
United States [Member]
Income Taxes [Line Items]
income (loss) before income taxes, domestic	(18,614,000)	(33,485,000)	(7,645,000)
loss before income taxes	$ (18,600,000)	$ (33,500,000)	$ (7,600,000)