Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Related Party Transactions (Details Textual)

v3.23.1
Note 10 - Related Party Transactions (Details Textual) - USD ($)
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Director [Member] | Related Party [Member]    
Common Stock, Percentage of Beneficial Stock Outstanding 5.00%  
BHS [Member] | Royalty Agreement and License [Member]    
Related Party Transaction, Automatic Renewal Period of Agreement (Year) 1 year  
Number of Days Termination Notice (Day) 90 days  
BHS [Member] | Related Party [Member] | Royalty Agreement and License [Member]    
Royalty Expense $ 11,000 $ 13,000