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Share-Based Compensation (Tables)
6 Months Ended
Jun. 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 six months ended June 30, 2025 and 2024 (in thousands):
Three Months Ended June 30,Six Months Ended June 30,
2025202420252024
Research and development$27 $37 $153 $123 
General and administrative212 200 616 568 
Total share-based compensation expense$239 $237 $769 $691 
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 June 30, 2025 were as follows (in thousands):
Stock OptionsRestricted Stock UnitsRestricted Stock
Unrecognized compensation cost$310 $167 $732 
Expected weighted-average period in years of compensation cost to be recognized2.000.512.11
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 six months ended June 30, 2025 and 2024 were as follows (in thousands):
Stock OptionsWarrants
Six Months Ended June 30,Six Months Ended June 30,
2025202420252024
Total fair value of shares vested$264 $201 $150 $— 
Weighted average estimated fair value of shares granted$2.60 $2.16 $— $—