XML 75 R57.htm IDEA: XBRL DOCUMENT v3.22.0.1
Employee Benefit Plans - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
May 20, 2020
Mar. 31, 2021
Oct. 01, 2021
Dec. 31, 2021
Jan. 01, 2021
Jan. 03, 2020
Dec. 28, 2018
ESPP              
Number of shares available for grant       11,004,584      
Reduction in share reserve after stock option or stock appreciation award (in shares)       1      
Reduction in share reserve after all other awards (in shares)       1.5      
Increase in share reserve under 2017 plan (in shares) 21,000,000            
Stock options granted (in shares)       2,573,000      
Maximum potential to vest     25.00%        
Stock-based compensation expense       $ 119,820 $ 105,070 $ 56,602  
Expenses relating to stock match       $ 9,500 6,700 4,600  
Minimum              
ESPP              
Number of months following change in control in which an employee was terminated       1 month      
Maximum              
ESPP              
Number of months following change in control in which an employee was terminated       13 months      
Stock options              
ESPP              
Expiration period       7 years      
Total unrecognized compensation expense       $ 27,800      
Unrecognized compensation expense weighted-average period for recognition       2 years 8 months 12 days      
Intrinsic value of options exercised       $ 76,000 106,500 54,100  
Cash received from option exercises and purchases under the ESPP       14,800 26,900 16,400  
Stock-based compensation expense       $ 19,048 $ 19,863 23,422  
Stock options | Share-based Payment Arrangement, Employee              
ESPP              
Award vesting period       4 years      
Stock options | Share-based Payment Arrangement, Nonemployee              
ESPP              
Award vesting period       1 year      
Restricted stock units              
ESPP              
Total unrecognized compensation expense       $ 123,600      
Unrecognized compensation expense weighted-average period for recognition       2 years 10 months 24 days      
Number of awards granted (in shares)       4,220,000      
Number of awards (in shares)       6,828,000 5,378,000    
Stock-based compensation expense       $ 53,629 $ 35,675 $ 26,056  
Restricted stock units | Share-based Payment Arrangement, Employee              
ESPP              
Award vesting period       4 years      
Restricted stock units | Share-based Payment Arrangement, Nonemployee              
ESPP              
Award vesting period       1 year      
ESPP              
ESPP              
Number of shares available for grant       3,168,354      
Discount rate from market value on purchase date (as a percent)       85.00%      
Discount rate from market value on offering date (as a percent)       85.00%      
Common stock issued (in shares)       536,226 534,419 483,009  
Average price per share (in dollars per share)       $ 17.76 $ 14.55 $ 12.60  
Proceeds from employee stock purchase plan       $ 9,500 $ 7,800 $ 6,100  
Purchase period       6 months      
Stock-based compensation expense       $ 3,715 $ 2,426 $ 2,246  
Performance stock units              
ESPP              
Unrecognized compensation expense weighted-average period for recognition       3 years      
Number of awards granted (in shares)   1,027,650   2,056,000   3,853,210 693,131
Maximum potential to vest   200.00%     200.00% 200.00%  
Additional shares to be earned (in shares)   2,055,300     4,655,680    
Number of awards (in shares)       6,310,000 7,378,000    
Stock-based compensation expense       $ 43,428 $ 47,106 $ 4,878  
Performance stock units | Share-based Payment Arrangement, Tranche One              
ESPP              
Vesting award percentage   50.00%          
Performance stock units | Share-based Payment Arrangement, Tranche Two              
ESPP              
Award vesting period   1 year          
Performance stock units | Achieved              
ESPP              
Number of awards (in shares)       4,853,112      
Performance stock units | Probable              
ESPP              
Total unrecognized compensation expense       $ 12,100      
Performance stock units | Not Probable              
ESPP              
Total unrecognized compensation expense       $ 121,600      
Performance Shares, Clinical Trial Results              
ESPP              
Number of awards granted (in shares)         2,327,840 1,926,605  
Performance Shares, Achieved Before December 31, 2020              
ESPP              
Maximum potential to vest         150.00%    
Performance Shares, Achieved Before December 31, 2021              
ESPP              
Maximum potential to vest       50.00%      
2018 Performance Stock Units              
ESPP              
Number of awards vested in period (in shares)         167,726