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Self-Insurance Reserves - Additional Information (Detail) - USD ($) $ in Thousands | Apr. 30, 2026 | Apr. 30, 2025 | Apr. 30, 2024
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Commitments and Contingencies Disclosure [Abstract] |  |  |
Reserves for workers' compensation, product liability, municipal liability, and medical/dental costs | $ 9,058 | $ 8,694 | $ 8,699
Reserves for workers' compensation, product liability, municipal liability, and medical/dental costs, Non-current portion | 3,400 | 3,600 |
Reserves for workers' compensation, product liability, municipal liability, and medical/dental costs, included in accrued expenses | 5,600 | 5,100 |
Workers' compensation receivable classified as an other assets | 1,100 | 1,100 |
Accrued reserves for product and municipal litigation liabilities | 3,600 | 3,100 |
Accrued reserves for product and municipal litigation liabilities, Non-current portion | $ 577 | $ 566 |

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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-10 + Details
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- Definition Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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- Definition Carrying amount of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property that are expected to be paid within one year (or the normal operating cycle, if longer). + References No definition available. + Details
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