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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2025 | Apr. 30, 2024
Income Taxes [Line Items] |  |
Deferred tax asset, Section 174 addback | $ 3,269 | $ 2,303
Deferred tax asset valuation allowance | 933 | 926
Foreign tax credit carryforwards | $ 638 | 638
Minimum |  |
Income Taxes [Line Items] |  |
Federal, state and local tax returns period (in years) | 3 years |
Foreign subsidiaries tax returns period (in years) | 3 years |
Maximum |  |
Income Taxes [Line Items] |  |
Federal, state and local tax returns period (in years) | 4 years |
Foreign subsidiaries tax returns period (in years) | 7 years |
India Income Tax Department |  |
Income Taxes [Line Items] |  |
Tax withholding expense | $ 416 | $ 371

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit 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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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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