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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2026 | Apr. 30, 2025 | Apr. 30, 2024
Income Tax Contingency [Line Items] |  |  |
Total cash paid during the period for income taxes | $ 5,661 | $ 7,300 | $ 12,700
Deferred tax assets credit carryforwards | $ 3,100 |  |
Federal income taxes, expected statutory rate | 21.00% | 21.00% |
Effective income tax rate, provisions (benefit) | 26.30% | 30.20% |
Accrued interest and penalties | $ 0 | $ 0 |
Gross tax-effected unrecognized tax benefits | 0 | 0 |
Federal |  |  |
Income Tax Contingency [Line Items] |  |  |
Net operating loss carryforwards | 0 |  |
Total cash paid during the period for income taxes | 3,870 |  |
State |  |  |
Income Tax Contingency [Line Items] |  |  |
Net operating loss carryforwards | 109,200 | 77,300 |
Tax credit carryforwards | 5,500 | 5,300 |
Deferred tax assets credit carryforwards | 5,500 | 2,400 |
Valuation allowances for net operating loss carryforward | 5,600 | 4,000 |
Valuation allowances for tax credits | $ 1,800 | $ 2,200 |
State | Minimum |  |  |
Income Tax Contingency [Line Items] |  |  |
Operating loss carry forwards expiration dates | Apr. 30, 2027 |  |
State tax credit carryforwards expire date | Apr. 30, 2027 |  |
State | Maximum |  |  |
Income Tax Contingency [Line Items] |  |  |
Operating loss carry forwards expiration dates | Apr. 30, 2041 |  |
State tax credit carryforwards expire date | Apr. 30, 2052 |  |

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- Definition Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible 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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