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Equity Incentive Plans (Tables)
 3 Months Ended
Mar. 31, 2021
Share-based Payment Arrangement [Abstract]  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Stock option activity for the three months ended March 31, 2021 is as follows:
Options Outstanding
Weighted Average Exercise Price
Balance - December 31, 20209,551,105 $5.55 
Options granted768,624 59.94 
Options exercised(399,174)0.44 
Options cancelled and forfeited(81,201)5.70 
Balance - March 31, 20219,839,354 $10.00 
Vested and exercisable, March 31, 2021
1,616,370 $2.44 
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity
The activity of restricted shares of Class A common stock for the three months ended March 31, 2021 is as follows:
Number of Shares
Weighted-Average
Grant Date
Fair Value
Unvested at December 31, 2020775,641 $1.77 
Granted10,728 1.66 
Repurchased(876)1.55
Vested(133,075)2.07
Unvested at March 31, 2021652,418$1.71 
Share-based Payment Arrangement, Restricted Stock Unit, Activity
The Company has granted RSUs under the 2020 RSU Plan and the 2020 Plan. RSU activity for the three months ended March 31, 2021 is as follows:
Restricted Stock Units
Weighted-Average
Grant Date
Fair Value
Balance at December 31, 2020491,318 $7.91 
Granted200,233 60.06 
Vested
(1,120)34.35
Cancelled
(947)19.00
Balance at March 31, 2021
689,484$23.05 
Share-based Payment Arrangement, Expensed and Capitalized, Amount
The following table summarizes the components of stock-based compensation recognized in the Company’s condensed consolidated statements of operations and comprehensive loss (in thousands):
Three Months Ended
March 31,
20212020
Research and development$1,492 $182 
Selling, general and administrative4,547 397 
Total stock-based compensation$6,039 $579