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Note C - Stockholders' Equity (Tables)
6 Months Ended
Dec. 31, 2023
Notes Tables  
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Stock Price at Date of Grant

  $ .248  

Risk-free interest rate

    3.97 %

Expected volatility of common stock

    90.37 %

Dividend yield

    0 %

Expected life of options

  10 years