Note 9 - Subsequent Events (Details Textual) - USD ($)			9 Months Ended
	Nov. 09, 2021	Nov. 01, 2021	Sep. 30, 2021	Sep. 30, 2020
Stock Issued During Period, Shares, New Issues (in shares)			11,000
Shares Issued, Price Per Share (in dollars per share)			$ 1.95
Proceeds from Issuance of Common Stock			$ 138,006	$ 136,156
Warrants and Rights Outstanding, Term (Year)			10 years
Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues (in shares)	2,400,000
Shares Issued, Price Per Share (in dollars per share)	$ 5.00
Proceeds from Issuance of Common Stock	$ 10,610,000
Stock Issued During Period, Shares, Exercise of Warrants (in shares)		204,444
Class of Warrant or Right, Exercised (in shares)		240,000
Subsequent Event [Member] | Underwriters Warrants [Member]
Class of Warrant or Right, Shares to Purchase Granted, Percent	6.00%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	144,000
Class of Warrant or Right, Exercise Price of Warrants or Rights, Percent (in dollars per share)	$ 125
Warrants and Rights Outstanding, Term (Year)	5 years
Subsequent Event [Member] | Over-Allotment Option [Member]
Stock Issued During Period, Shares, New Issues (in shares)	360,000
Shares Issued, Price Per Share (in dollars per share)	$ 5.00
Sale of Stock, Over-allotment Option Period (Day)	45 days