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Note J - Intangible Assets (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Amortization of Intangible Assets, Total $ 43,256 $ 15,596
Finite-Lived Intangible Asset, Expected Amortization, Year One 20,000  
Finite-Lived Intangible Asset, Expected Amortization, Year Four 17,000  
Finite-Lived Intangible Asset, Expected Amortization, Year Two 13,000  
Finite-Lived Intangible Asset, Expected Amortization, after Year Five 65,000  
Finite-Lived Intangible Asset, Expected Amortization, Year Two 20,000  
Finite-Lived Intangible Asset, Expected Amortization, Year Three 20,000  
Patents [Member]    
Inventory Write-down 15,000  
Research, Development, and Engineering Expense [Member]    
Amortization of Intangible Assets, Total $ 28,256 $ 15,596