Quarterly report [Sections 13 or 15(d)]

Note 2 - Summary of Significant Accounting Policies - Schedule of Earnings Per Share, Basic and Antidilutive Securities (Details)

v3.25.3
Note 2 - Summary of Significant Accounting Policies - Schedule of Earnings Per Share, Basic and Antidilutive Securities (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Net income (loss) attributable to common stockholders $ 3,544,000 $ (5,326,000) $ (3,570,000) $ (14,637,000)
Weighted-average number of common shares—basic (in shares) 1,090,129 248,007 719,639 182,738
Basic net income (loss) per common share (in dollars per share) $ 3.25 $ (21.47) $ (4.96) $ (80.1)
Net loss attributable to common stockholders - diluted $ (4,141,000) $ (5,326,000) $ (3,570,000) $ (14,637,000)
Deemed dividend on exchange of Series AA, AAA and AAA Junior Preferred Stock for Series B Preferred Stock (in shares) 471,677 0 0 0
Weighted-average number of common shares outstanding, diluted (in shares) 1,561,806 248,007 719,639 182,738
Diluted net loss per common share (in dollars per share) $ (2.65) $ (21.47) $ (4.96) $ (80.1)
Preferred Stock [Member]        
Anti-dilutive securities excluded from computation of earnings per share (in shares) 2,209,000 304,000 2,681,000 304,000
Options, Warrants, Restricted Stock Units [Member]        
Anti-dilutive securities excluded from computation of earnings per share (in shares) 1,143,000 54,000 1,143,000 54,000
Convertible Debt Securities [Member]        
Anti-dilutive securities excluded from computation of earnings per share (in shares) 138,000 0 138,000 0
Additional Investment Rights (AIRs) [Member]        
Anti-dilutive securities excluded from computation of earnings per share (in shares) 486,000 210,000 486,000 210,000