Note 7 - Subsequent Events (Details Textual) - USD ($)	Nov. 04, 2021	Oct. 28, 2021	Sep. 30, 2021	Jan. 28, 2021
Revolving Credit Facility [Member]
Debt Instrument, Collateral Amount			$ 1,500,000	$ 750,000
Subsequent Event [Member] | Revolving Credit Facility [Member]
Debt Instrument, Increase (Decrease) in Collateral Amount	$ 1,500,000
Debt Instrument, Collateral Amount	$ 3,000,000
Subsequent Event [Member] | Paycheck Protection Program CARES Act [Member]
Debt Instrument, Decrease, Forgiveness		$ 1,999,175