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Stock Option Plan (Tables)
6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Stock Option Plan [Abstract]    
Schedule of Activity Under the Plan is Set Forth

Activity under the Plan is set forth below:

 

   Options Outstanding 
Stock Option Activity  Shares
Available for
Grant
   Number of
Options
   Weighted-
Average
Exercise Price
Per Share
   Weighted-
Average
Remaining
Contractual
Term
(in years)
 
Balances at January 1, 2025   1,560,091    2,972,055   $0.40    3.00 
Options granted   (1,560,091)   1,560,091   $1.26      
Options exercised   
    
   $
      
Options expired   
    
   $
      
Options cancelled/forfeited   11,896    (11,896)  $0.63      
Balances at June 30, 2025   11,896    4,520,250   $0.70    6.48 
Exercisable at June 30, 2025        2,364,814   $1.04    5.48 
Vested and expected to vest at June 30, 2025        4,520,250    0.70    6.48 

 

   Options Outstanding 
Stock Option Activity  Shares
Available for
Grant
   Number of
Options
   Weighted-
Average
Exercise Price
Per Share
   Weighted-
Average
Remaining
Contractual
Term
(in years)
 
Balances at December 31, 2023   1,550,091    2,982,055   $0.40    3.70 
Options granted   
    
   $
      
Options exercised   
    
   $
      
Options expired   10,000    (10,000)  $0.001      
Options cancelled/forfeited   
    
   $
      
Balances at June 30, 2024   1,560,091    2,972,055   $0.40    3.53 
Exercisable at June 30, 2024        1,464,429   $0.49    4.88 
Vested and expected to vest at June 30, 2024        2,972,055    0.40    3.53 

Activity under the Plan is set forth below:

 

   Options Outstanding 
Stock Option Activity  Shares
Available
for Grant
   Number of
Options
   Weighted-
Average
Exercise
Price Per
Share
   Weighted-
Average
Remaining
Contractual
Term
(in years)
 
Balances at January 1, 2024   1,550,091    2,982,055   $0.40    3.70 
Options granted   
    
   $
      
Options exercised   
    
   $
      
Options expired   10,000    (10,000)  $0.001      
Options cancelled/forfeited   
    
   $
      
Balances at December 31, 2024   1,560,091    2,972,055   $0.40    3.00 
Exercisable at December 31, 2024        1,548,910   $0.49    4.32 
Vested and expected to vest at December 31, 2024        2,972,055    0.40    3.00 
Schedule of Stock Compensation Expense by Function Recognized for the Years

The following table is a summary of stock compensation expense by function recognized for the three and six months ended June 30, 2025 and 2024 (in thousands):

 

   Six months ended
June 30,
 
   2025   2024 
General Administrative  $33   $4 
Research and development   54    7 
   $87   $11 

 

   Three months ended
June 30,
 
   2025   2024 
General Administrative  $31   $2 
Research and development   51    4 
   $82   $6 

The following table is a summary of stock compensation expense by function recognized for the years ended December 31, 2024 and 2023 (in thousands):

 

   Years ended
December 31,
 
   2024   2023 
General Administrative  $7   $10 
Research and development   14    23 
   $21   $33