Note 6 - Long-term Debt (Details Textual) - Loan Agreement to Fund Machinery Acquisition [Member]	1 Months Ended
Sep. 30, 2022 USD ($)
Debt Instrument, Face Amount	$ 432,000
Debt Instrument, Number of Payments	60
Debt Instrument, Periodic Payment	$ 8,352
Debt Instrument, Interest Rate, Stated Percentage	6.00%

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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant