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Note 4 - Equipment Loan (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Mar. 20, 2021
Jun. 30, 2022
Jun. 30, 2022
Jun. 30, 2021
Repayments of Long-Term Debt, Total     $ 27,110 $ 13,221
Debit Arrangement to Finance Purchase of Output Solutions Sorter [Member]        
Debt Instrument, Face Amount $ 165,996      
Debt Instrument, Term (Month) 36 months      
Debt Instrument, Periodic Payment, Total $ 4,902      
Debt Instrument, Annual Periodic Payment $ 58,821      
Debt Instrument, Interest Rate, Stated Percentage 3.95%      
Repayments of Long-Term Debt, Total   $ 13,622