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Note 6 - Lease Commitments (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Operating Lease, Cost $ 47,308 $ 43,178 $ 142,160 $ 144,529
Operating Lease, Weighted Average Remaining Lease Term (Year) 6 years 9 months 18 days   6 years 9 months 18 days  
Operating Lease, Weighted Average Discount Rate, Percent 3.25%   3.25%  
Operating Lease, Payments     $ 137,748 $ 130,506