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Share-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2025
Share-Based Payment Arrangement [Abstract]  
Schedule Share-based Compensation Expense The following table summarizes the components of share-based compensation expense for the three and nine months ended September 30, 2025 and 2024 (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2025202420252024
Research and development$38 $35 $190 $158 
General and administrative194 292 811 860 
Total share-based compensation expense$232 $327 $1,001 $1,018 
Schedule of Total Compensation Cost Related to Nonvested Awards
Total compensation cost related to unvested awards not yet recognized and the weighted-average periods over which the awards were expected to be recognized at September 30, 2025 were as follows (in thousands):
Stock OptionsRestricted Stock UnitsRestricted Stock
Unrecognized compensation cost$263 $83 $631 
Expected weighted-average period in years of compensation cost to be recognized1.810.281.91
Schedule of Fair Value of Share-based Compensation Awards
Total fair value of shares vested and the weighted average estimated fair values of shares granted for the nine months ended September 30, 2025 and 2024 were as follows (in thousands):
Stock OptionsWarrants
Nine Months Ended September 30,Nine Months Ended September 30,
2025202420252024
Total fair value of shares vested$267 $204 $150 $— 
Weighted average estimated fair value of shares granted$2.60 $2.15 $— $1.99