Annual report pursuant to Section 13 and 15(d)

Equity Incentive Plans - Schedule of Restricted Stock Units (Details)

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Equity Incentive Plans - Schedule of Restricted Stock Units (Details) - RSUs - $ / shares
shares in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Number of shares      
Unvested at beginning balance (in shares) 103    
Granted (in shares) 63 113 45
Vested (in shares) (49)    
Forfeited (in shares) (17)    
Unvested at ending balance (in shares) 100 103  
Weighted average grant date fair value      
Unvested beginning balance (in usd per share) $ 3.70    
Granted (in usd per share) 1.74 $ 3.62 $ 4.56
Vested (in usd per share) 3.27    
Forfeited (in usd per share) 3.17    
Unvested ending balance (in usd per share) $ 2.76 $ 3.70