v3.24.2.u1
Share-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock Option Activity
The following table summarizes the stock option activity during the six months ended June 30, 2024:
Stock
Option
Shares
Weighted Average
Exercise
Price
Weighted Average
Remaining
Contractual
Term (in Years)
Aggregate
Intrinsic
Value (in thousands)
Outstanding, January 1, 20244,579,659 $14.11 8.37$25 
Granted1,461,715 1.87 
Exercised— — 
Expired/cancelled(590,041)11.41 
Outstanding as of June 30, 20245,451,333 $11.05 8.40$16 
Options exercisable as of June 30, 20242,478,035 $13.97 7.81$16 
Vested and expected to vest as of June 30, 20245,451,333 $11.05 8.40$16 
Schedule of Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity
Activity with respect to the Company’s restricted stock units during the six months ended June 30, 2024 is as follows:
SharesWeighted Average
Grant Date Fair Value
Nonvested shares at January 1, 202432,558 $4.30 
Granted308,700 1.92 
Vested/Issued— — 
Forfeited(7,410)1.92 
Nonvested shares at current period end333,848 $2.15 
Schedule of Recognized Compensation Cost Related to Employee and Non-employee Stock-Based Compensation Activity
The Company recognized the following compensation cost related to employee and non-employee share-based compensation activity for the periods presented (in thousands):
Three Months Ended June 30,Six Months Ended June 30,
2024202320242023
Selling, general and administrative$1,772 $1,846 $4,114 $3,486 
Research and development1,067 1,208 2,314 2,308 
Total$2,839 $3,054 $6,428 $5,794 
Schedule of Stock Options Valuation Assumptions
The calculation was based on the following assumptions:
Three Months Ended June 30,Six Months Ended June 30,
2024202320242023
Weighted average grant date fair value (per share)$1.27$6.07$1.39$7.95
Risk-free interest rate
4.27% - 4.29%
3.47% - 3.85%
4.13% - 4.29%
3.42% - 4.17%
Expected volatility
89.96% - 90.53%
91.54% - 99.29%
89.22% - 91.46%
89.94% - 99.29%
Expected term (in years)
5.50 - 6.06
5.50 - 6.08
5.00 - 6.08
5.50 - 6.08
Expected dividend yield