Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Sep. 30, 2025	Dec. 31, 2024
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	4,970,680	4,970,680
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	120,000,000	120,000,000
Common stock, issued (in shares)	33,634,221	256,397
Common stock, outstanding (in shares)	33,634,220	256,396
Treasury stock, shares (in shares)	1	1
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
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)	6	11,757
Temporary equity, shares outstanding (in shares)	6	11,757
Series D Preferred Stock [Member]
Temporary equity, par value (in dollars per share)	$ 0.001	$ 0.001
Temporary equity, shares authorized (in shares)	5,000	5,000
Temporary equity, shares issued (in shares)	4	0
Temporary equity, shares outstanding (in shares)	4	0