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Note 7 - Stock Options and Other Compensation (Details Textual)
3 Months Ended
Mar. 31, 2024
$ / shares
shares
May 31, 2089
Mar. 31, 2023
shares
Number Of Key Executive Officer To Whom Non Statutory Stock Option Granted   4  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number | shares 767,500   767,500
Share-Based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit $ 1    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in dollars per share) $ 1.25