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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Apr. 30, 2025 | Apr. 30, 2024
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Schedule Of Deferred Tax Assets And Liabilities Abstract |  |
Employee benefits | $ 2,810 | $ 2,826
Inventory | 2,876 | 2,536
Accounts receivable | 144 | 70
Tax credits | 1,945 | 2,173
Other assets | 301 | 303
Deferred costs | 1,511 | 681
Lease liability | 2,128 | 1,547
Capital loss carry-forward | 194 | 212
Research & development | 2,247 | 1,104
Net operating loss carryforwards | 2,276 | 6,320
Total deferred tax asset | 16,432 | 17,772
Property, plant and equipment | (74) | (191)
Right of use asset | (2,104) | (1,510)
Other liabilities | (77) | (61)
Deferred state income tax | (779) | (791)
Net deferred tax asset | 13,398 | 15,219
Valuation allowance | (1,353) | (15,227)
Net deferred tax asset (liability) | $ 12,045 | $ (8)

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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