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Note I - Stock-based Compensation (Tables)
9 Months Ended
Jan. 31, 2024
Notes Tables  
Stock Option Plan Comparison [Table Text Block]
   

Restated Option Plan

 
         

Minimum exercise price as a percentage of fair market value at date of grant

    100%  

Last expiration date for outstanding options

 

January 25, 2034

 

Shares available for grant at January 31, 2024

    487,514  
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   

Nine Months Ended
January 31,

 
   

2024

   

2023

 

Expected terms (years)

    3.9       5.5  

Risk-free interest rate

    4.06 %     3.59 %

Volatility

    56 %     55 %

Dividend yield

    -       -  
Schedule of Share-based Compensation, Stock Options, Exercises [Table Text Block]
   

Nine Months Ended
January 31,

 

(Dollars in thousands)

 

2024

   

2023

 
                 

Options exercised

    30,000       23,000  

Cash received from option exercises

  $ -     $ 1,216  

Intrinsic value of options exercised

  $ 1,036     $ 1,204