Annual report pursuant to Section 13 and 15(d)

Note 3 - Summary of Significant Accounting Policies (Details Textual)

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Note 3 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Research Grant, Recognized, Research Activities Performed 2018 $ 205,000 $ 856,000
Research and Development Expense [Member]    
Patent Expense $ 105,000 $ 87,000
Office Equipment [Member] | Minimum [Member]    
Property, Plant and Equipment, Useful Life (Year) 3 years  
Office Equipment [Member] | Maximum [Member]    
Property, Plant and Equipment, Useful Life (Year) 10 years  
Computer Equipment [Member]    
Property, Plant and Equipment, Useful Life (Year) 4 years