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Note Receivable - Narrative (Detail) $ in Millions		1 Months Ended		3 Months Ended			12 Months Ended
Note Receivable - Narrative (Detail) $ in Millions	Jan. 24, 2023 USD ($)	Apr. 30, 2025 USD ($)	Apr. 30, 2025 CAD ($)	May 03, 2026 USD ($)	May 03, 2026 CAD ($)	Apr. 27, 2025 USD ($)	May 03, 2026 USD ($)	May 03, 2026 USD ($)	Apr. 27, 2025 USD ($)	Apr. 28, 2024 USD ($)	Apr. 30, 2025 CAD ($)	Aug. 02, 2024 USD ($)
Note Receivable [Line Items]
Fair value of note receivable				$ 1,182,000			$ 1,182,000	$ 1,182,000
Proceeds from sale of property							1,103,000		$ 1,945,000	$ 385,000
Interest rate								6.00%
Proceeds from note receivable							5,093,000		610,000	330,000
United States [Member]
Note Receivable [Line Items]
Note receivable				1,200,000		$ 1,500,000	1,200,000	$ 1,200,000	1,500,000
Note receivable, short-term				297,000		280,000	297,000	297,000	280,000
Note receivable, long-term				885,000		1,200,000	885,000	885,000	1,200,000
Amortization of unearned interest income				80,000		96,000	$ 80,000	$ 80,000	$ 96,000	$ 111,000
Sales Agreement [Member] \| Canada [Member]
Note Receivable [Line Items]
Assets held for sale, total sales price of property		$ 6,200,000									$ 8.6
Proceeds from sale of property		1,400,000	$ 2.0
Remaining cash proceeds received from sale of property				$ 4,700,000	$ 6.6
Note receivable		$ 4,800,000									$ 6.6
Sales Agreement [Member] \| Canada [Member] \| Minimum [Member]
Note Receivable [Line Items]
Percentage rate of interest earned							6.00%
Sales Agreement [Member] \| Canada [Member] \| Maximum [Member]
Note Receivable [Line Items]
Percentage rate of interest earned							10.00%
CUF Haiti [Member]
Note Receivable [Line Items]
Gross carrying amount of note receivable	$ 2,400,000
Fair value of note receivable	2,000,000
CUF Haiti [Member] \| CUF Termination Agreement [Member]
Note Receivable [Line Items]
Return possession of leased facility	$ 2,400,000
Note receivable commencement date	Apr. 01, 2023
Note receivable maturity date	Dec. 31, 2029
CHF Haiti [Member] \| CHF Termination Agreement [Member]
Note Receivable [Line Items]
Note receivable												$ 250,000
Proceeds from note receivable						$ 250,000