XML 15 R5.htm IDEA: XBRL DOCUMENT v3.25.3
CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
Total
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2023   19,354,335    
Beginning balance at Dec. 31, 2023 $ 17,276,000 $ 19,000 $ 150,822,000 $ (133,565,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Stock-based compensation 865,000   865,000  
Stock option exercises, net of cashless exercises (in shares)   11,939    
Issuance of shares for vested restricted stock grants (in shares)   184,691    
Net gain (loss) (1,406,000)     (1,406,000)
Ending balance (in shares) at Sep. 30, 2024   19,550,965    
Ending balance at Sep. 30, 2024 16,735,000 $ 19,000 151,687,000 (134,971,000)
Beginning balance (in shares) at Jun. 30, 2024   19,492,702    
Beginning balance at Jun. 30, 2024 17,307,000 $ 19,000 151,422,000 (134,134,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Stock-based compensation 265,000   265,000  
Stock option exercises, net of cashless exercises (in shares)   7,064    
Issuance of shares for vested restricted stock grants (in shares)   51,199    
Net gain (loss) (837,000)     (837,000)
Ending balance (in shares) at Sep. 30, 2024   19,550,965    
Ending balance at Sep. 30, 2024 $ 16,735,000 $ 19,000 151,687,000 (134,971,000)
Beginning balance (in shares) at Dec. 31, 2024 19,782,311 19,782,311    
Beginning balance at Dec. 31, 2024 $ 17,747,000 $ 19,000 152,211,000 (134,483,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Stock-based compensation 585,000   585,000  
Stock option exercises, net of cashless exercises (in shares)   339,757    
Stock option exercises, net of cashless exercises 854,000 $ 1,000 853,000  
Issuance of shares for vested restricted stock grants (in shares)   73,704    
Net gain (loss) $ (279,000)     (279,000)
Ending balance (in shares) at Sep. 30, 2025 20,195,772 20,195,772    
Ending balance at Sep. 30, 2025 $ 18,907,000 $ 20,000 153,649,000 (134,762,000)
Beginning balance (in shares) at Jun. 30, 2025   20,025,843    
Beginning balance at Jun. 30, 2025 18,005,000 $ 20,000 153,037,000 (135,052,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Stock-based compensation 204,000   204,000  
Stock option exercises, net of cashless exercises (in shares)   158,501    
Stock option exercises, net of cashless exercises 408,000 $ 0 408,000  
Issuance of shares for vested restricted stock grants (in shares)   11,428    
Net gain (loss) $ 290,000     290,000
Ending balance (in shares) at Sep. 30, 2025 20,195,772 20,195,772    
Ending balance at Sep. 30, 2025 $ 18,907,000 $ 20,000 $ 153,649,000 $ (134,762,000)