Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Related Party Transactions (Details Textual)

v3.22.2
Note 10 - Related Party Transactions (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Director [Member]        
Common Stock, Percentage of Beneficial Stock Outstanding 5.00%   5.00%  
BHS [Member] | Royalty Agreement and License [Member]        
Royalty Expense $ 13,000 $ 11,000 $ 26,000 $ 19,000
Related Party Transaction, Automatic Renewal Period of Agreement (Year)     1 year  
Number of Days Termination Notice (Day)     90 days