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Share-based Compensation (Tables)
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Common Stock Options Outstanding and Related Activity
The following is a summary of stock option information and weighted-average exercise prices:

20212020
Number of OptionsWeighted Average Exercise PriceNumber of OptionsWeighted Average Exercise Price
Outstanding at January 110,215,834$0.45 9,899,765$0.38 
Granted2,623,6896.30 3,794,4860.82 
Exercised(704,672)0.63 (417,866)0.28 
Canceled(1,769,796)0.75 (3,050,929)0.71 
Expired(7,560)0.12 (9,622)0.63 
Outstanding at December 3110,357,4951.87 10,215,8340.45 
Exercisable at December 316,712,145$0.73 6,673,539$0.30 
Schedule of Key Weighted Average Assumptions for 2021 Grants The key weighted average assumptions for 2021 grants are as follows:
Year Ended December 31,
20212020
Expected volatility64.9 %63.5 %
Risk-free rate0.9 %0.5 %
Expected term in years5.896.0
Dividend yield— %— %
Summary of RSU information
The following is a summary of RSU information and weighted-average grant date fair values for the Company's RSUs:

Year Ended December 31,
20212020
SharesWeighted Average Grant Date Fair ValueSharesWeighted Average Grant Date Fair Value
Unvested at January 1$— $— $— $— 
Granted4,085,666 4.08
Vested— 
Forfeited(15,399)4.67
Unvested at December 31$4,070,267 $4.08 $— $— 
Schedule of Stock-based Compensation Expense
Total stock-based compensation was recognized as follows (in thousands):

Year Ended December 31,
20212020
General and administrative$1,826 $206 
Sales and marketing939 445
Research and development1,494 419
Total stock-based compensation$4,259 $1,070