Commitments and Contingencies - Narrative (Detail) - USD ($)	Jul. 30, 2023	Apr. 30, 2023	[1]	Jul. 31, 2022
Commitments and Contingencies Disclosure [Line Items]
Accounts payable for capital expenditures	$ 257,000	$ 56,000		$ 346,000
Mattress Fabrics [Member] | Capital Addition Purchase Commitments [Member]
Commitments and Contingencies Disclosure [Line Items]
Open purchase commitments for equipment	$ 2,000,000

[1] Derived from audited consolidated financial statements.