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EQUITY INCENTIVE PLANS - Additional Information (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 6 Months Ended 12 Months Ended 36 Months Ended
Dec. 01, 2022
Nov. 30, 2022
USD ($)
Jun. 01, 2022
Feb. 28, 2022
Feb. 28, 2021
Jan. 31, 2021
Feb. 29, 2020
Oct. 31, 2016
offering_purchase_period
purchase_period
shares
May 31, 2023
$ / shares
Nov. 30, 2022
$ / shares
May 31, 2023
$ / shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
Dec. 31, 2022
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Shares available for future issuance (in shares) | shares                       10,176,585 11,164,880   10,176,585
Equity instruments other than options, vested and expected to vest (In shares) | shares                         500,000    
Options granted during the period (in shares) | shares                             0
Estimated grant date fair value of option vested                       $ 2,400 $ 2,800 $ 4,900  
Total stock-based compensation expense                       $ 57,740 54,527 41,515  
ESPP                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Shares available for future issuance (in shares) | shares                       2,206,279     2,206,279
Percentage of payroll deductions of eligible compensation               15.00%              
Offering period (in months)               12 months              
Number of purchase period | offering_purchase_period               2              
Purchase period (in months)               6 months              
Percentage of common stock fair market value available for employee purchase               85.00%              
Unamortized compensation costs related to unvested stock options, expected period of recognition                       8 months 12 days      
Total stock-based compensation expense   $ 200                          
Expected term (in years)                   6 months          
Expected minimum volatility (as a percent)     81.40%                        
Expected maximum volatility (as a percent)     96.30%                        
Risk-free interest rate, minimum (as a percent)     1.60%                        
Risk-free interest rate, maximum (as a percent)     2.20%                        
Expected dividend yield     0.00%                        
Granted (in USD per share) | $ / shares                   $ 55.02          
Total unamortized compensation costs, net of estimated forfeitures related to unvested stock options                       $ 4,400     $ 4,400
ESPP | Forecast                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Expected term (in years)                 6 months   1 year        
ESPP | Forecast | Share-Based Payment Arrangement, Tranche One                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Granted (in USD per share) | $ / shares                     $ 68.52        
ESPP | Forecast | Share-Based Payment Arrangement, Tranche Two                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Granted (in USD per share) | $ / shares                 $ 48.34            
Unvested restricted stock units and performance-based restricted stock units                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Total unamortized compensation costs, net of estimated forfeitures related to restricted stock unit and performance share                       $ 112,500     112,500
Unamortized compensation costs related to unvested stock options, expected period of recognition                       1 year 10 months 24 days      
Intrinsic value of equity other than options nonvested                       $ 137,200 $ 160,100 198,600 137,200
Equity instruments other than options, vested and expected to vest (In shares) | shares                         1,400,000    
Aggregate intrinsic value of equity instruments other than options, vested and expected to vest                         $ 128,200    
Estimated grant date fair value of option vested                       $ 33,400 $ 22,300 16,300  
Granted (in USD per share) | $ / shares                       $ 147.94 $ 88.67    
Performance shares                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Total unamortized compensation costs, net of estimated forfeitures related to restricted stock unit and performance share                       $ 28,200     28,200
Unamortized compensation costs related to unvested stock options, expected period of recognition                       2 years 1 month 6 days      
Intrinsic value of equity other than options nonvested                       $ 52,600 $ 33,900 65,700 52,600
Aggregate intrinsic value of equity instruments other than options, vested and expected to vest                       49,900     $ 49,900
Estimated grant date fair value of option vested                       $ 12,100 $ 20,900 $ 0  
Expected term (in years)       2 years 10 months 24 days                      
Risk free interest rate       1.70%                      
Implied volatility rate       81.20%                      
Expected dividend yield       0.00%                      
2016 Plan                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Shares available for future issuance (in shares) | shares               3,865,000       7,822,637     7,822,637
Percentage of outstanding shares               5.00%              
Employee Stock Purchase Plan("ESPP")                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Shares available for future issuance (in shares) | shares               483,031              
Percentage of outstanding shares               1.50%              
Increase in shares available for future issuance (in shares) | shares               966,062              
Percentage of payroll deductions of eligible compensation               15.00%              
Offering period (in months)               12 months              
Number of purchase period | purchase_period               2              
Purchase period (in months)               6 months              
Percentage of common stock fair market value available for employee purchase               85.00%              
Common stock issued to employees (in shares) | shares                       87,664      
Employee Stock Purchase Plan("ESPP") | ESPP                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Expected minimum volatility (as a percent) 68.10%                            
Expected maximum volatility (as a percent) 73.40%                            
Risk-free interest rate, minimum (as a percent) 4.70%                            
Risk-free interest rate, maximum (as a percent) 4.70%                            
Expected dividend yield 0.00%                            
Maximum | ESPP                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Expected term (in years)     1 year                        
Maximum | Employee Stock Purchase Plan("ESPP") | ESPP                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Expected term (in years) 1 year                            
Maximum | 2020 Awards | Performance shares                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Performance threshold (as a percentage)             29.00%                
Performance target to be earned at performance threshold (as a percentage)             200.00%                
Maximum | 2021 Awards | Performance shares                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Performance threshold (as a percentage)           10.00%                  
Performance target to be earned at performance threshold (as a percentage)           100.00%                  
Maximum | 2021 Awards | Performance shares | Awarded February 2021                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Performance threshold (as a percentage)         29.00%                    
Performance target to be earned at performance threshold (as a percentage)         200.00%                    
Maximum | 2022 Awards | Performance shares                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Performance threshold (as a percentage)       23.00%                      
Performance target to be earned at performance threshold (as a percentage)       200.00%                      
Minimum | ESPP                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Expected term (in years)     6 months                        
Minimum | Employee Stock Purchase Plan("ESPP") | ESPP                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Expected term (in years) 6 months                            
Minimum | 2020 Awards | Performance shares                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Performance threshold (as a percentage)             19.70%                
Performance target to be earned at performance threshold (as a percentage)             50.00%                
Minimum | 2021 Awards | Performance shares | Awarded February 2021                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Performance threshold (as a percentage)         19.70%                    
Performance target to be earned at performance threshold (as a percentage)         50.00%                    
Minimum | 2022 Awards | Performance shares                              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Performance threshold (as a percentage)       13.00%                      
Performance target to be earned at performance threshold (as a percentage)       50.00%