Note 5 - Equipment Loan (Details Textual) - USD ($)		9 Months Ended
Mar. 20, 2021	Sep. 30, 2021	Sep. 30, 2020
Repayments of Long-term Debt, Total		$ 26,446	$ (0)
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		$ 26,446

Face (par) amount of debt instrument at time of issuance.

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