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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | Apr. 30, 2023 | Apr. 30, 2022
--- | --- | ---
Tax Credit Carryforward [Line Items] |  |
Valuation allowance | $ 5,573 | $ 5,122
Foreign Tax Authority [Member] |  |
Tax Credit Carryforward [Line Items] |  |
Valuation allowance | 300 |
Gross amount of state tax credit carryforwards | 2,200 | 1,900
State [Member] |  |
Tax Credit Carryforward [Line Items] |  |
Gross amount of state tax credit carryforwards | 3,600 | 3,700
Net deferred tax assets related to tax credit carryforwards | 300 | 400
State [Member] | Other Liabilities [Member] |  |
Tax Credit Carryforward [Line Items] |  |
Net deferred tax assets related to tax credit carryforwards | $ 300 | $ 400

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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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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-3 + Details
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