XML 86 R45.htm IDEA: XBRL DOCUMENT v3.21.2
Stock-based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Jul. 28, 2021
Jan. 01, 2021
Jul. 02, 2020
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Jul. 27, 2021
Jul. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Exercisable, weighted-average exercise price (usd per share)       $ 15.52   $ 15.52   $ 9.64        
Stock-based compensation expense       $ 12.7 $ 2.7 $ 30.7 $ 7.3 $ 10.6 $ 4.3 $ 2.1    
2020 Plan                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Common stock reserved for issuance (shares)     5,503,678                  
Common stock reserved for issuance, annual increase, percentage of outstanding shares   5.00% 5.00%                  
Maximum shares that may be issued upon exercise of incentive stock options (shares)     3,650,000                  
Additional shares authorized (shares)   2,838,412                    
Common stock available for grant (shares)       5,733,902   5,733,902   4,936,501        
2020 ESPP                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Common stock reserved for issuance (shares)     1,000,000                  
Common stock reserved for issuance, annual increase, percentage of outstanding shares   1.00% 1.00%                  
Additional shares authorized (shares)   567,682                    
Common stock available for grant (shares)       0   0            
2015 Plan                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Common stock reserved for issuance (shares)                       7,312,590
Common stock available for grant (shares)       0   0   0        
Stock options                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Stock-based compensation expense       $ 12.0 2.7 $ 28.0 7.3          
Unrecognized expense, stock options       104.7   $ 104.7   $ 36.9        
Unrecognized expense, period for recognition           1 year 4 months 24 days   1 year 6 months        
Stock options | 2015 Plan                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Vesting period           4 years   4 years        
Expiration period           10 years   10 years        
Repriced stock options                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Exercisable, weighted-average exercise price (usd per share) $ 90.70                      
Repricing of stock options, incremental expense $ 3.0                      
Stock-based compensation expense       0.6   $ 0.6            
Repriced stock options | Minimum                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Exercisable, weighted-average exercise price (usd per share)                     $ 142.64  
Repriced stock options | Maximum                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Exercisable, weighted-average exercise price (usd per share)                     $ 159.02  
RSUs                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Stock-based compensation expense       0.7 $ 0.0 2.7 $ 0.0          
Unrecognized expense, RSUs       $ 12.4   $ 12.4            
Unrecognized expense, period for recognition           1 year 8 months 12 days