Stock Compensation And Equity Transactions (Black-Scholes Option Pricing Model) (Details) - Option Plans [Member] - $ / shares	12 Months Ended
Apr. 30, 2024	Apr. 30, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility	73.00%	67.00%
Risk-free interest rate	3.95%	2.93%
Expected life of options (in years)	5 years 9 months	6 years
Grant date fair value	$ 3.42	$ 6.66

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details