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Stockholders’ Deficit - Schedule of Stock Option and Restricted Stock Activity (Details)
$ / shares in Units, $ in Thousands, shares in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2022
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Number of shares available for issuance under the Plans    
Beginning balance (in shares) 95.2  
Additional shares authorized (in shares) 18.8  
Options and restricted stock units and awards canceled (in shares) 2.0  
Shares withheld related to net share settlement of restricted stock units and awards (in shares) 1.5  
Options and restricted stock units and awards granted (in shares) (4.7)  
Ending balance (in shares) 112.8 95.2
Options Outstanding, Number of shares outstanding under the Plans    
Beginning balance (in shares) 0.9  
Options exercised and restricted stock units and awards released (in shares) (0.1)  
Options and restricted stock units and awards canceled (in shares) 0.0  
Ending balance (in shares) 0.8 0.9
Vested at end of period (in shares) 0.5  
Unvested at end of period (in shares) 0.3  
Options Outstanding, Weighted- average exercise price per share    
Beginning balance (in dollars per share) | $ / shares $ 12.09  
Options exercised and restricted stock units and awards released (in dollars per share) | $ / shares 2.05  
Options and restricted stock units and awards canceled (in dollars per share) | $ / shares 4.86  
Ending balance (in dollars per share) | $ / shares 13.38 $ 12.09
Vested at end of period (in dollars per share) | $ / shares 17.53  
Unvested at end of period (in dollars per shares) | $ / shares $ 3.20  
Options Outstanding, Weighted- average remaining contractual term (In years)    
Weighted-average contractual term 5 years 5 years 4 months 24 days
Vested at end of period 4 years  
Options outstanding, aggregate intrinsic value | $ $ 7,100 $ 10,000
Vested at end of period, aggregate intrinsic value | $ 3,200  
Unvested at end of period, aggregate intrinsic value | $ $ 3,900  
Restricted Stock    
Restricted Stock Outstanding, Number of Plan shares outstanding    
Beginning balance (in shares) 27.8  
Options exercised and restricted stock units and awards released (in shares) (3.9)  
Options and restricted stock units and awards canceled (in shares) (1.9)  
Options and restricted stock units and awards granted (in shares) 4.7  
Ending balance (in shares) 26.7 27.8
Vested at end of period (in shares) 0.0  
Restricted Stock Outstanding, Weighted- average grant date fair value per share    
Beginning balance (in dollars per share) | $ / shares $ 24.17  
Options exercised and restricted stock units and awards released (in dollars per share) | $ / shares 24.65  
Options and restricted stock units and awards canceled (in dollars per share) | $ / shares 22.29  
Shares withheld related to net share settlement of restricted stock units and awards (in dollars per share) | $ / shares 24.85  
Options and restricted stock units and awards granted (in dollars per share) | $ / shares 24.04  
Ending balance (in dollars per share) | $ / shares 24.22 $ 24.17
Vested at end of period (in dollars per share) | $ / shares $ 0