Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Stockholders' Equity - Stock-based Compensation Expense for Stock Options and Warrants (Details)

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Note 8 - Stockholders' Equity - Stock-based Compensation Expense for Stock Options and Warrants (Details) - Stock Options and Warrants [Member] - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Share-based compensation expense $ 127,957 $ 126,067 $ 799,379 $ 440,426
General and Administrative Expense [Member]        
Share-based compensation expense 65,800 62,684 571,462 226,572
Selling and Marketing Expense [Member]        
Share-based compensation expense 20,972 19,522 56,183 83,335
Research and Development Expense [Member]        
Share-based compensation expense $ 41,185 $ 43,861 $ 171,734 $ 130,519