Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

v3.22.1
Stockholders' Equity (Details) - USD ($)
$ in Thousands, shares in Millions
3 Months Ended
Jan. 01, 2022
Mar. 31, 2022
Mar. 31, 2021
Apr. 04, 2022
Oct. 06, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Awards granted (in shares)   0.9      
Stock options outstanding (in shares)   25.5      
Stock options exercisable (in shares)   9.4      
Lock-up period   180 days      
Unrecognized share-based compensation expense, options   $ 26,100      
Share-based compensation   $ 21,438      
Subsequent Event          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options exercisable (in shares)       12.1  
ESPP          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares reserved for issuance (in shares)   2.9      
Annual increase in shares authorized, percent   1.00%      
Maximum shares available for issuance (in shares)   29.0      
Purchase price of commons stock, percent   85.00%      
Stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Contractual term   10 years      
Vesting period   4 years      
Share-based compensation expense   $ 11,400 $ 0    
Unrecognized share-based compensation expense, period of recognition   3 years 3 months 18 days      
Stock options | Center operations          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense   $ 1,000      
Stock options | General, administrative and marketing          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense   10,100      
Stock options | Other operating income/expense          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense   300      
Restricted stock units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense   $ 5,200 0    
Unrecognized share-based compensation expense, period of recognition   3 years 6 months      
Awards granted (in shares)   0.1      
Share-based compensation   $ 500      
Awards outstanding (in shares)   1.9      
Unrecognized share-based compensation expense   $ 19,400      
Restricted stock units | Share-based Payment Arrangement, Tranche One          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period   4 years      
Vesting percentage   50.00%      
Restricted stock units | Share-based Payment Arrangement, Tranche Two          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period   2 years      
Restricted stock units | Center operations          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense   $ 200      
Restricted stock units | General, administrative and marketing          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense   5,000      
Restricted stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense   $ 4,800 $ 0    
Awards outstanding (in shares)   0.6      
Unrecognized share-based compensation expense   $ 200      
2021 Equity Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares reserved for issuance (in shares)         14.5
Annual increase in shares authorized, percent   4.00%      
Additional shares available for issuance (in shares) 7.7        
Term of plan   10 years      
Shares available for future grants (in shares)   20.6      
2015 Equity Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares available for issuance (in shares)         1.0