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Equity Incentive Awards - Summary of Stock Options Activity (Details)
shares in Thousands
 9 Months Ended
Sep. 30, 2022
$ / shares
shares
Number of Options (in thousands)  
Beginning balance (in shares) | shares 13,288
Options granted (in shares) | shares 10,592
Options exercised (in shares) | shares (15)
Options forfeited (in shares) | shares (4,644)
Ending balance (in shares) | shares 19,221
Exercisable (in shares) | shares 5,302
Weighted- Average Grant- Date Fair Value  
Beginning balance (in USD per share) | $ / shares $ 9.34
Options granted (in USD per share) | $ / shares 1.26
Options exercised (in USD per share) | $ / shares 0.19
Options forfeited (in USD per share) | $ / shares 5.42
Ending balance (in USD per share) | $ / shares 5.84
Exercisable (in USD per share) | $ / shares $ 11.71