Note 9 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
Apr. 30, 2023	Apr. 30, 2022
Current Income Tax Expense (Benefit)	$ 1,714	$ 3,102
Current Federal Tax Expense (Benefit)	1,238	2,279
Current State and Local Tax Expense (Benefit)	476	$ 823
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 0

Amount of current federal tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, current national tax expense (benefit) for non-US (United States of America) jurisdiction.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section S99
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
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Amount of current state and local tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, current regional, territorial, and provincial tax expense (benefit) for non-US (United States of America) jurisdiction.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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-SubTopic 10
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