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Stockholders' Equity (Deficit )- Schedule of Stock Option Activity under the Plans (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares , Granted 663,256      
Weighted- Average Exercise Price ,Granted $ 29.99      
Stock Options        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of Shares, Beginning balance 32,458,408 28,965,640 27,748,135  
Number of shares , Granted   10,054,450 8,229,541  
Number of Shares, Options exercised (8,731,889) (4,240,315) (4,261,484)  
Number of Shares, Options canceled (1,388,903) (2,321,367) (2,750,552)  
Number of Shares, Ending balance 23,000,872 32,458,408 28,965,640 27,748,135
Number of Shares, Options vested 13,931,506      
Weighted Average Exercise Price, Beginning balance $ 4.60 $ 3.18 $ 2.16  
Weighted- Average Exercise Price ,Granted   7.90 5.73  
Weighted Average Exercise Price, Options exercised 3.70 2.42 2.09  
Weighted Average Exercise Price, Canceled 5.62 5.04 2.08  
Weighted Average Exercise Price, Ending balance 5.62 $ 4.60 $ 3.18 $ 2.16
Weighted Average Exercise Price, Options vested $ 3.48      
Weighted Average Remaining Contractual Term 6 years 9 months 21 days 7 years 9 months 8 years 8 years 1 month 17 days
Weighted Average Remaining Contractual Term, Options vested 5 years 10 months 28 days      
Aggregate Intrinsic Value, Beginning balance $ 625,058 $ 106,730 $ 4,574  
Aggregate Intrinsic Value, Ending balance 436,630 $ 625,058 $ 106,730 $ 4,574
Aggregate Intrinsic Value, Options vested $ 292,064