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Stock-Based Compensation Expense (Tables)
12 Months Ended
Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]  
Schedule of stock option
   Shares   Weighted-
average
exercise
price
   Weighted-
average
remaining
contractual
term (years)
   Aggregate
intrinsic
value
 
Outstanding as of December 31, 2020   6,971,301   $0.20    7.0   $1,399,827 
Vested and expected to vest at December 31, 2020   10,892,738   $0.54    7.0   $5,860,120 
Vested and exercisable at December 31, 2020   5,978,428   $0.20    7.03   $406,094 
Granted   2,926,473    3.20           
Exercised   (41,416)   0.23         109,902 
Cancelled/forfeited   (1,086,664)  $0.20           
Outstanding as of December 31, 2021   8,769,694   $1.20    7.15   $15,746,916 
Vested and expected to vest at December 31, 2021   8,769,694   $1.20    7.15   $15,746,916 
Vested and exercisable at December 31, 2021   5,645,763   $0.27    5.94   $14,967,973 

 

Schedule of weighted average fair value of each grant estimated on grant date
   December 31,
2021
   December 31,
2020
 
Fair value of common stock  $2.78   $0.23 
Expected term (in years)   6.15    6.00 
Risk-free rate   0.95%   0.68%
Expected volatility   51.0%   29.34%
Dividend yield   0%   0%