Note 10 - Series D Convertible Preferred Stock (Details Textual)			12 Months Ended
	Jun. 04, 2004 $ / shares shares	Feb. 23, 2004 USD ($) $ / shares shares	Dec. 31, 2022 shares	Dec. 31, 2021 shares	Feb. 17, 2004 USD ($) $ / shares
Class of Warrant or Right, Warrants Exercisable During Period	2,500,000	2,500,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 0.17	$ 0.38
Preferred Stock, Convertible, Conversion Price | $ / shares					$ 0.2551
Preferred Stock, Shares Outstanding, Ending Balance			0	0
Series D Preferred Stock [Member]
Investment Owned, Face Amount | $					$ 2,500,000
Shares Purchased Under Agreement Amount | $		$ 1,250,000
Shares Purchased Under Agreement Shares	1,250,000	1,250,000
Conversion of Stock, Shares Converted	5,000,000	5,000,000
Debt Instrument, Convertible, Conversion Price | $ / shares		$ 0.25
Preferred Stock, Convertible, Conversion Price | $ / shares	$ 0.25
Registration Delay Payment, Number Used to be Multiplied by the Number of Days	5
Preferred Stock, Shares Outstanding, Ending Balance			907,144	907,144
Conversion of Stock, Shares Issued			3,628,576