Note 8 - Stockholders' Equity (Details Textual) - USD ($)	Feb. 11, 2021	Sep. 30, 2022	Dec. 31, 2021
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 3.57	$ 3.57
Warrant Issued in connection with Conversion of Subordinated Debt [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)	150,418
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 2.507
Class of Warrant or Right, Grant Date Fair Value (in dollars per share)	$ 2.02
Class of Warrant or Right, Period Following Issuance at which Warrants are Exercisable (Year)	1 year
Warrants and Rights Outstanding	$ 304,000
Warrants Issued in Connection With the Conversion of Subordinated Loan Agreement to Common Stock [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)	150,418
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 2.507
Class of Warrant or Right, Period Following Issuance at which Warrants are Exercisable (Year)	1 year
Class of Warrant or Right, Grants in Period, Grant Date Fair Value (in dollars per share)	$ 2.02
Conversion from Subordinated Promissory Note to Common Stock [Member]
Debt Conversion, Original Debt, Amount	$ 625,000
Debt Conversion, Accrued Interest, Amount	$ 62,000
Debt Conversion, Converted Instrument, Shares Issued (in shares)	601,674