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Note 7 - Stock Options and Other Compensation (Details Textual)
May 31, 2089
Dec. 31, 2023
$ / shares
shares
Dec. 31, 2022
$ / shares
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
Minimum [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price   $ 1 $ 1
Maximum [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price   $ 1.25 $ 1.25