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Stock-based Compensation (Tables)
6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock Option Activity
The following table summarizes stock option activity for the six months ended June 30, 2024:
OptionsWeighted
average
exercise
price
Weighted
average
remaining
contractual
term (years)
Aggregate
Intrinsic
Value (in
thousands)
Outstanding as of December 31, 20236,023,370$3.94 
Exercised(3,810)0.99 $
Granted3,674,3651.77 
Forfeited (1,008,687)4.70 
Outstanding as of June 30, 20248,685,238$2.93 8.14$2,018 
Exercisable as of June 30, 20243,487,670$2.19 6.40$1,517 
Schedule of Estimated Using The Black-Scholes Option-Pricing Model The fair values in the six months ended June 30, 2024 and 2023 were estimated using the Black-Scholes option-pricing model based on the following assumptions:
Six Months Ended June 30,
20242023
Risk-free interest rate
3.77% - 4.59%
2.92% - 4.03%
Expected term6 years6 years
Expected volatility
103.00% - 107.10%
57.77% - 65.00%
Expected dividend yield— — 
Schedule of Stock-based Compensation Expense
The Company recorded stock-based compensation expense in the following expense categories in its accompanying unaudited interim consolidated statements of operations:
Three Months Ended June 30,Six Months Ended June 30,
2024202320242023
Research and development$(44)$24 $392 $34 
General and administrative669 306 1,290 561 
$625 $330 $1,682 $595