Quarterly report [Sections 13 or 15(d)]

Condensed Statements of Stockholders' Equity (Deficit) and Mezzanine Equity (Unaudited)

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Condensed Statements of Stockholders' Equity (Deficit) and Mezzanine Equity (Unaudited) - USD ($)
Preferred Stock [Member]
Series C Preferred Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Total
Series L Preferred Stock [Member]
Mezzanine Equity [Member]
Series L Preferred Stock [Member]
Balance at Dec. 31, 2023 $ 1,000 $ 1,000 $ 689,539,000 $ (682,065,000) $ 7,476,000    
Balance, shares at Dec. 31, 2023 96,230 1,380,653          
Fair value of vested stock options 222,000 222,000    
Net loss (5,976,000) (5,976,000)    
Issuance of prefunded warrants in settlement of vendor payable         810,000    
Issuance of common stock and warrants for cash, net $ 1,000 2,975,000 2,976,000    
Issuance of common stock and warrants for cash, net, shares   740,000          
Cancellation of common stock previously issued to prior CFO    
Cancellation of common stock previously issued to prior CFO, shares   (13,902)          
Issuance of common stock in settlement of vendor payable 810,000 810,000    
Issuance of common stock in settlement of vendor payable, shares   127,597          
Balance at Jun. 30, 2024 $ 1,000 $ 2,000 693,546,000 (688,041,000) 5,508,000    
Balance, shares at Jun. 30, 2024 96,230 2,234,348          
Balance at Mar. 31, 2024 $ 1,000 $ 1,000 689,641,000 (684,331,000) 5,312,000    
Balance, shares at Mar. 31, 2024 96,230 1,380,653          
Fair value of vested stock options 120,000 120,000    
Net loss (3,710,000) (3,710,000)    
Issuance of common stock and warrants for cash, net $ 1,000 2,975,000 2,976,000    
Issuance of common stock and warrants for cash, net, shares   740,000          
Cancellation of common stock previously issued to prior CFO    
Cancellation of common stock previously issued to prior CFO, shares   (13,902)          
Issuance of common stock in settlement of vendor payable 810,000 810,000    
Issuance of common stock in settlement of vendor payable, shares   127,597          
Balance at Jun. 30, 2024 $ 1,000 $ 2,000 693,546,000 (688,041,000) 5,508,000    
Balance, shares at Jun. 30, 2024 96,230 2,234,348          
Balance at Dec. 31, 2024 $ 1,000 $ 2,000 693,554,000 (695,227,000) (1,670,000)    
Balance, shares at Dec. 31, 2024 96,230 2,234,328          
Mezzanine equity balance, shares at Dec. 31, 2024           0
Mezzanine equity balance at Dec. 31, 2024          
Exercise of warrants for cash and inducement warrants, net $ 1,000 1,051,000 1,052,000    
Exercise of warrants for cash and inducement warrants, net, shares   537,069          
Series L convertible preferred stock and warrants issued for cash, net 3,389,000 3,389,000   $ 2,052,000
Series L convertible preferred stock and warrants issued for cash, net, shares             6,611
Conversion of Series L convertible preferred stock into common stock 96,000 96,000   $ (96,000)
Conversion of Series L convertible preferred stock into common stock, shares   151,598         (310)
Issuance and exercise of prefunded warrants for ELOC fee 672,000 672,000    
Issuance and exercise of prefunded warrants for ELOC fee, shares   300,000          
Issuance of common stock and warrants for services 718,000 718,000    
Issuance of common stock and warrants for services, shares   50,000          
Issuance of warrants for VRT waiver 44,000 44,000    
Dividend on Series L convertible preferred stock (85,000) (85,000)    
Fair value of vested stock options 7,000 7,000    
Net loss (2,209,000) (2,209,000)    
Issuance of prefunded warrants in settlement of vendor payable 847,000 847,000    
Balance at Jun. 30, 2025 $ 1,000 $ 3,000 700,378,000 (697,521,000) 2,861,000    
Balance, shares at Jun. 30, 2025 96,230 3,272,995          
Mezzanine equity balance, shares at Jun. 30, 2025           6,301 6,301
Mezzanine equity balance at Jun. 30, 2025           $ 1,956,000 $ 1,956,000
Balance at Mar. 31, 2025 $ 1,000 $ 3,000 695,019,000 (696,003,000) (980,000)    
Balance, shares at Mar. 31, 2025 96,230 2,536,397          
Mezzanine equity balance, shares at Mar. 31, 2025            
Mezzanine equity balance at Mar. 31, 2025            
Exercise of warrants for cash and inducement warrants, net 436,000 436,000    
Exercise of warrants for cash and inducement warrants, net, shares   235,000          
Series L convertible preferred stock and warrants issued for cash, net 3,389,000 3,389,000   $ 2,052,000
Series L convertible preferred stock and warrants issued for cash, net, shares             6,611
Conversion of Series L convertible preferred stock into common stock 96,000 96,000   $ (96,000)
Conversion of Series L convertible preferred stock into common stock, shares   151,598         (310)
Issuance and exercise of prefunded warrants for ELOC fee 672,000 672,000    
Issuance and exercise of prefunded warrants for ELOC fee, shares   300,000          
Issuance of common stock and warrants for services 718,000 718,000    
Issuance of common stock and warrants for services, shares   50,000          
Issuance of warrants for VRT waiver 44,000 44,000    
Dividend on Series L convertible preferred stock (85,000) (85,000)    
Fair value of vested stock options 4,000 4,000    
Net loss (1,433,000) (1,433,000)    
Balance at Jun. 30, 2025 $ 1,000 $ 3,000 $ 700,378,000 $ (697,521,000) $ 2,861,000    
Balance, shares at Jun. 30, 2025 96,230 3,272,995          
Mezzanine equity balance, shares at Jun. 30, 2025           6,301 6,301
Mezzanine equity balance at Jun. 30, 2025           $ 1,956,000 $ 1,956,000