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Income Taxes (Schedule Of Significant Components Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands | Apr. 30, 2019 | Apr. 30, 2018
--- | --- | ---
Deferred tax assets: |  |
Accounts receivable | $ 1,852 | $ 4,772
Product liability | 2,133 | 2,180
Employee benefits | 6,192 | 6,513
Other | 3,272 | 2,865
Gross deferred tax assets, before valuation allowance | 17,888 | 20,267
Valuation allowance | (3,630) | (2,467)
Gross deferred tax assets, after valuation allowance | 14,258 | 17,800
Deferred tax liabilities: |  |
Pension benefits | 119 | 1,035
Inventory | 76 | 240
Depreciation | 23,721 | 21,076
Intangibles | 53,259 | 65,294
Other | 1,059 | 986
Total | 78,234 | 88,631
Net deferred tax liability | 63,976 | 70,831
State [Member] |  |
Deferred tax assets: |  |
Tax credit carryforwards | $ 4,439 | $ 3,937

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