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Stock based compensation (Tables)
9 Months Ended
Sep. 30, 2022
Stock based compensation  
Schedule of stock option activity

Weighted Average 

Remaining

Aggregate

Contractual

Intrinsic

Term

Value

    

Shares

    

Exercise Price

    

(years)

(in thousands)

Outstanding January 1, 2022

 

5,678,604

$

5.36

 

8.35

$

11,595

Granted

 

2,417,782

 

12.55

 

 

Exercised - vested

 

(203,001)

 

1.24

 

 

Forfeited

 

(169,326)

 

6.30

 

 

Outstanding, September 30, 2022

 

7,724,059

$

7.63

 

8.04

$

28,307

Exercisable at September 30, 2022

3,186,663

$

3.93

7.51

$

17,362

Schedule of weighted-average assumptions

September 30, 2022

Expected dividend rate

 

 

Expected option term (years)

 

6.07

 

Expected volatility

 

73.47

%  

Risk-free interest rate

 

1.95

%  

Schedule of restricted stock activity

    

    

Weighted Average

Shares

Grant Date Fair Value

Total Unvested December 31, 2021

 

681,789

$

4.20

Granted

Vested

 

(434,009)

 

1.80

Total Unvested September 30, 2022

 

247,780

$

8.41