Note 5 - Series C Redeemable Convertible Preferred Stock (Details Textual) - USD ($)	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	0	0
Conversion of Series C Convertible Preferred Stock into Common Stock [Member]
Preferred Stock, Convertible, Conversion Price	$ 0.2551
Conversion of Stock, Shares Issued (in shares)	524,736
Series C Convertible Preferred Stock [Member]
Preferred Stock, Stated Value	$ 10,000
Increase in Stated Value of Preferred Stock	$ 1,671
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	11.469249	11.5
Dividends Payable	$ 19,168