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Note 5 - Lease Commitments (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Operating Lease, Cost $ 44,343 $ 46,414 $ 94,134 $ 94,221
Operating Lease, Weighted Average Remaining Lease Term (Year) 9 years   9 years  
Operating Lease, Weighted Average Discount Rate, Percent 3.25%   3.25%  
Operating Lease, Payments $ 35,801 $ 37,224 $ 76,920 $ 73,948