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Intangible Assets - Narrative (Detail) - USD ($) | 3 Months Ended | 9 Months Ended | 30 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 26, 2025 | Jan. 28, 2024 | Jan. 26, 2025 | Jan. 28, 2024 | Jan. 26, 2025 | Apr. 28, 2024 | Apr. 30, 2023
Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Impairment charges of tradename |  |  | $ 0 |  |  |  |  |
Gross carrying amount of customer relationships | $ 3,100,000 | $ 3,100,000 | 3,100,000 | $ 3,100,000 | $ 3,100,000 | $ 3,100,000 |  |
Incurred operating losses | (3,887,000) | (1,740,000) | (16,138,000) | (7,061,000) |  |  |  |
Gross carrying amount of non-compete agreement | 2,000,000 | 2,000,000 | 2,000,000 | 2,000,000 | 2,000,000 | 2,000,000 |  |
Property, plant and equipment, net | 25,939,000 | 34,021,000 | 25,939,000 | 34,021,000 | 25,939,000 | 33,182,000 | [1] |
Right of use assets | 6,103,000 | 6,952,000 | 6,103,000 | 6,952,000 | 6,103,000 | 6,203,000 | [1] |
Customer Relationships [Member] |  |  |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Finite-lived intangible assets, net | 809,000 | 1,110,000 | 809,000 | 1,110,000 | 809,000 | 1,035,000 |  | $ 1,335,000
Accumulated amortization | 2,300,000 | 2,000,000 | 2,300,000 | 2,000,000 | 2,300,000 | 2,100,000 |  |
Remaining amortization expense for the fiscal year | 75,000 |  | 75,000 |  | 75,000 |  |  |
Remaining amortization expense for the first fiscal year | 301,000 |  | 301,000 |  | 301,000 |  |  |
Remaining amortization expense for the second fiscal year | 280,000 |  | 280,000 |  | 280,000 |  |  |
Remaining amortization expense for the third fiscal year | 51,000 |  | 51,000 |  | 51,000 |  |  |
Remaining amortization expense for the fourth fiscal year | 51,000 |  | 51,000 |  | 51,000 |  |  |
Remaining amortization expense for the fiscal year thereafter | $ 51,000 |  | $ 51,000 |  | $ 51,000 |  |  |
Weighted average remaining amortization period | 3 years 2 months 12 days |  | 3 years 2 months 12 days |  | 3 years 2 months 12 days |  |  |
Customer Relationships [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Useful life | 9 years |  | 9 years |  | 9 years |  |  |
Customer Relationships [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Useful life | 17 years |  | 17 years |  | 17 years |  |  |
Non-Compete Agreement [Member] |  |  |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Useful life | 15 years |  | 15 years |  | 15 years |  |  |
Finite-lived intangible assets, net | $ 245,000 | 320,000 | $ 245,000 | 320,000 | $ 245,000 | 301,000 |  | $ 377,000
Accumulated amortization | 1,800,000 | $ 1,700,000 | 1,800,000 | $ 1,700,000 | 1,800,000 | $ 1,700,000 |  |
Remaining amortization expense for the fiscal year | 19,000 |  | 19,000 |  | 19,000 |  |  |
Remaining amortization expense for the first fiscal year | 76,000 |  | 76,000 |  | 76,000 |  |  |
Remaining amortization expense for the second fiscal year | 76,000 |  | 76,000 |  | 76,000 |  |  |
Remaining amortization expense for the third fiscal year | $ 74,000 |  | $ 74,000 |  | $ 74,000 |  |  |
Weighted average remaining amortization period | 3 years 3 months 18 days |  | 3 years 3 months 18 days |  | 3 years 3 months 18 days |  |  |
Mattress Asset Group [Member] |  |  |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Carrying amount of asset group, net | $ 24,900,000 |  | $ 24,900,000 |  | $ 24,900,000 |  |  |
Impairment charge |  |  | 0 |  |  |  |  |
Mattress Asset Group [Member] | Mattress Fabrics [Member] |  |  |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Incurred operating losses |  |  |  |  | 35,300,000 |  |  |
Mattress Asset Group [Member] | Customer Relationships [Member] | Mattress Fabrics [Member] |  |  |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Finite-lived intangible assets, net | 268,000 |  | 268,000 |  | 268,000 |  |  |
Mattress Asset Group [Member] | Non-Compete Agreement [Member] | Mattress Fabrics [Member] |  |  |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Finite-lived intangible assets, net | 245,000 |  | 245,000 |  | 245,000 |  |  |
Mattress Asset Group [Member] | Property, Plant and Equipment [Member] |  |  |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Property, plant and equipment, net | 24,200,000 |  | 24,200,000 |  | 24,200,000 |  |  |
Mattress Asset Group [Member] | Right Of Use Assets [Member] |  |  |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Right of use assets | $ 200,000 |  | $ 200,000 |  | $ 200,000 |  |  |
[1] | Derived from audited consolidated financial statements.

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