Note 9 - Series C Convertible Preferred Stock (Details Textual) - USD ($)			12 Months Ended
	Feb. 17, 2004	Oct. 10, 2000	Dec. 31, 2022	Dec. 31, 2021
Preferred Stock, Value, Issued			$ 0	$ 0
Preferred Stock, Convertible, Conversion Price	$ 0.2551
Preferred Stock, Shares Outstanding, Ending Balance			0	0
Series C Preferred Stock [Member]
Proceeds from Issuance of Private Placement		$ 7,500,000
Preferred Stock, Value, Issued		10,000	$ 0	$ 0
Increase in Stated Value of Preferred Stock	$ 1,671	$ 1,671
Preferred Stock Dividends and Other Adjustments, Total	$ 5
Additional Increase Per Annum Value Of Preferred Stock	5.00%
Preferred Stock, Shares Outstanding, Ending Balance			11.469249	11.47
Conversion of Stock, Shares Issued			524,736
Dividends Payable			$ 19,168