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Stock Compensation (Tables)
12 Months Ended
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of assumptions used to estimate fair value The table below summarizes the assumptions for the indicated periods:
 Year Ended December 31,
 202320222021
Risk-free interest rate3.9 %1.4 %0.4 %
Expected term of options (years)555
Volatility65 %100 %62 %
Weighted average grant-date fair value per share$0.73 $0.86 $0.17 
Schedule of stock option activity
The following table represents the Company’s stock option activity for the year ended December 31, 2023:  
SharesWeighted Average
Exercise Price
Outstanding at January 1, 2023
8,099,885 $1.29 
Granted800,000 1.27 
Exercised(61,484)0.70 
Forfeited or expired(554,400)1.99 
Outstanding at December 31, 2023
8,284,001 1.24 
Exercisable at December 31, 2023
6,736,494 $1.26 
Schedule of weighted average grant date fair value of restricted stock The table below summarizes the weighted average grant date fair value of restricted stock for the indicated periods:  
 Year Ended December 31,
 202320222021
Weighted average grant date fair value$1.36 $1.73 $1.23 
Schedule of non vested restricted stock activity
The following is a rollforward of the activity in restricted stock for the year ended December 31, 2023:    
SharesWeighted Average
Grant Date
Fair Value
Nonvested at January 1, 2023
9,953,866 $1.47 
Granted7,860,740 1.36 
Vested(8,819,458)1.29 
Forfeited(159,067)1.47 
Nonvested at December 31, 2023
8,836,081 $1.56 
Schedule of fair value measurement inputs The total fair value of these shares was $19.0 million and computed using the following assumptions on the transaction date:
Underlying Stock Price and
Exercise Price
Term (Years)
Volatility
Risk-Free Interest Rate
Fair Value of Consideration
$1.13 0.574.5 %5.52 %
The fair value of 5.0 million of the warrants, which is the portion that vested immediately on the effective date of the agreement, was estimated using the Black-Scholes option pricing model with the following assumptions on the valuation date of December 7, 2023.

Number of warrants (in millions)
5.0 
Grant dateDecember 7, 2023
Exercise price$2.00 
Expected term (years)5
Risk-free interest rate4.11 %
Volatility92.14 %
Black-Scholes fair value per share$1.00 
Total fair value (in millions)
$5.0 
The Monte Carlo simulation was computed using the following assumptions:
Risk-Free Interest Rate
Stock Price Volatility
Market Price of Common Stock
Fair Value of RSUs
4.73 %80.00 %$1.29