Note 7 - Stockholders' Equity and Common Stock Warrants (Details Textual)			6 Months Ended
	Apr. 18, 2022 shares	Mar. 18, 2022 USD ($) $ / shares shares	Jun. 30, 2022 shares
Class of Warrant or Rights, Expired (in shares)			18,077
Conversion of Series C Preferred Stock into Common Stock [Member]
Conversion of Stock, Shares Converted (in shares)	10,000
Conversion of Stock, Shares Issued (in shares)	200
Series C Preferred Stock [Member]
Preferred Stock, Convertible, Conversion Ratio		0.02
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares		$ 25.00
Series C Preferred Stock [Member] | President [Member]
Stock Issued During Period, Shares, New Issues (in shares)		10,000
Sale of Stock, Price Per Share (in dollars per share) | $ / shares		$ 0.50
Proceeds from Issuance of Convertible Preferred Stock | $		$ 5,000