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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($)
$ in Thousands
Total
Convertible Preferred Stock [Member]
Preferred Stock [Member]
Preferred Stock [Member]
Series F Preferred Stock [Member]
Common Stock [Member]
Treasury Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Balance at Dec. 31, 2022 $ 6,445       $ 2   $ 473,628 $ (467,185)
Balance (in shares) at Dec. 31, 2022   1,952     2,240,092      
Share-based compensation 569           569  
Sale and issuance of common stock, net 5,005       $ 3   5,002  
Sale and issuance of common stock, net (in shares)       1 2,230,493      
Redemption of Series F preferred stock (in shares)     (1)          
Issuance of common stock for in process research and development 75           75  
Issuance of common stock for in process research and development (in shares)         53,381      
Fractional adjustment         (1,310)      
Purchase of treasury stock (126)         $ (126)    
Purchase of treasury stock (in Shares)           (78,559)    
Net loss (13,316)             (13,316)
Balance at Dec. 31, 2023 (1,348)       $ 5 $ (126) 479,274 (480,501)
Balance (in shares) at Dec. 31, 2023   1,952     4,522,656 (78,559)    
Share-based compensation 550           550  
Sale and issuance of common stock, net 1       $ 1      
Sale and issuance of common stock, net (in shares)         1,439,988      
Exercise of pre-funded warrants (in Shares)         192,114      
Purchase of treasury stock (374)         $ (374)    
Purchase of treasury stock (in Shares)           (179,866)    
Reclass of warrants to equity 5,200           5,200  
Net loss (12,978)             (12,978)
Balance at Dec. 31, 2024 $ (8,949)       $ 6 $ (500) $ 485,024 $ (493,479)
Balance (in shares) at Dec. 31, 2024   1,952     6,154,758 (258,425)