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, authorized (in shares)	10,000,000	10,000,000
Preferred stock, issued (in shares)	582	582
Preferred stock, outstanding (in shares)	582	582
Common stock, par value (in dollars per share)	$ 0.18	$ 0.18
Common stock, authorized (in shares)	350,000,000	350,000,000
Common stock, issued (in shares)	129,170,004	129,170,004
Common stock, outstanding (in shares)	129,170,004	129,170,004
Treasury stock, shares (in shares)	1,320,046	1,320,046