Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Mar. 31, 2025	Dec. 31, 2024
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	4,975,680	4,975,680
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001	$ 0.001
Common Stock, Shares Authorized (in shares)	120,000,000	120,000,000
Common Stock, Shares, Issued (in shares)	3,555,954	256,397
Common Stock, Shares, Outstanding (in shares)	3,555,953	256,396
Treasury stock, shares (in shares)	1	1
Series C Preferred Stock [Member]
Temporary equity, par value (in dollars per share)	$ 0.001	$ 0.001
Temporary equity, shares authorized (in shares)	18,820	18,820
Temporary equity, shares issued (in shares)	2,833	11,757
Temporary equity, shares outstanding (in shares)	2,833	11,757
Preferred stock, par value (in dollars per share)	$ 1,000
Series B Preferred Stock [Member]
Temporary equity, par value (in dollars per share)	$ 0.001	$ 0.001
Temporary equity, shares authorized (in shares)	5,500	5,500
Temporary equity, shares issued (in shares)	0	0
Temporary equity, shares outstanding (in shares)	0	0