Note 6 - Preferred Stock - Schedule of Stock by Class (Details) - USD ($)		12 Months Ended		21 Months Ended
	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Mar. 30, 2023
Accrued Dividends amount		$ 89,000	$ 343,000
Preferred stock, shares outstanding (in shares)		545	1,930	545
Conversion of Series F Preferred Stock to Common Stock [Member]
Conversions, preferred (in shares)		(3,033)	(4,620)
Conversions, Shares Issued (in shares)		288,968	352,624	641,592
Series F Preferred Stock [Member]
Issuance, preferred (in shares)	6,550	1,648
Accrued Dividends amount		$ 89,000	$ 343,000
Conversions, preferred (in shares)		(3,033)	(4,620)
Conversions dividend		$ (196,000)	$ (207,000)
Convertible, Conversion Price (in dollars per share)		$ 11.17		$ 11.17	$ 68.4
Preferred stock, shares outstanding (in shares)		545	1,930	545
Balance dividend		$ 29,000	$ 136,000	$ 29,000
Series F Preferred Stock [Member] | Weighted Average [Member]
Convertible, Conversion Price (in dollars per share)		$ 11.2	$ 13.6	$ 11.2