XML 29 R17.htm IDEA: XBRL DOCUMENT v3.24.3
Share-Based Compensation
 9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Share-Based Compensation Share-Based Compensation
Share-Based Compensation
The Company utilizes share-based compensation in the form of stock options, restricted stock, restricted stock units and warrants. The following table summarizes the components of share-based compensation expense for the three and nine months ended September 30, 2024 and 2023 (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
Research and development$35 $103 $158 $517 
General and administrative292 203 860 1,048 
Total share-based compensation expense$327 $306 $1,018 $1,565 

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, 2024 were as follows (in thousands):
Stock OptionsRestricted Stock UnitsWarrantsRestricted Stock
Unrecognized compensation cost$278 $121 $62 $535 
Expected weighted-average period in years of compensation cost to be recognized1.950.490.211.86
Total fair value of shares vested and the weighted average estimated fair values of shares granted for the nine months ended September 30, 2024 and 2023 were as follows (in thousands):
Stock OptionsWarrants
Nine Months Ended September 30,Nine Months Ended September 30,
2024202320242023
Total fair value of shares vested$204 $1,001 $— $— 
Weighted average estimated fair value of shares granted$2.15 $2.10 $1.99 $— 

Valuation Assumptions
The fair value of stock options and warrants at the date of grant was estimated using the Black-Scholes option pricing model. The expected volatility is based upon historical volatility of the Company’s stock. The expected term for the options is based upon observation of actual time elapsed between date of grant and exercise of options for all employees. The expected term for the warrants is based upon the contractual term of the warrants.