Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	Apr. 30, 2024	Apr. 30, 2023
Tax Credit Carryforward [Line Items]
Valuation allowance	$ 5,878	$ 5,573
Foreign Tax Authority [Member]
Tax Credit Carryforward [Line Items]
Valuation allowance	200
Gross amount of state tax credit carryforwards	2,400	2,200
State [Member]
Tax Credit Carryforward [Line Items]
Gross amount of state tax credit carryforwards	3,700	3,600
Net deferred tax assets related to tax credit carryforwards	200	300
State [Member] | Other Liabilities [Member]
Tax Credit Carryforward [Line Items]
Net deferred tax assets related to tax credit carryforwards	$ 200	$ 300