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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jan. 01, 2026
Jan. 01, 2025
Jan. 01, 2024
Dec. 31, 2025
Dec. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options granted in period (in shares)       84,000  
Total stock-based compensation expense       $ 28,696 $ 34,872
Exercised       $ 695 $ 10,100
Fair value of stock (in dollars per share)       $ 10.36 $ 40.92
Granted (in shares)       3,901,706 5,384,760
Shares reserved for future issuance (in shares)       9,406,212 7,494,238
Term Loan Credit Agreement Three Amendment          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share based compensation arrangement by share based payment award, annual increase percent of shares outstanding       1.00%  
Performance Based Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)       90,500  
Total stock-based compensation expense       $ 0  
Unrecognized stock-based compensation expense related to unvested stock options       $ 1,400  
Granted (in shares)       125,000  
Unvested RSU awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)       716,850 0
Granted (in USD per share)       $ 11.71 $ 0
Aggregate fair value of RSU awards vested       $ 500 $ 0
Unrecognized stock-based compensation expense related to unvested stock options       $ 6,900  
Unvested award, period for recognition       1 year 8 months 15 days  
Shares reserved for future issuance (in shares)       716,850 0
Unvested Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized stock-based compensation expense related to unvested stock options       $ 22,900  
Performance Based Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Total stock-based compensation expense       2,000  
Unrecognized stock-based compensation expense related to unvested stock options       2,900  
Share-based payment arrangement, nonvested award, cost not yet recognized, recognition expected       400  
Share-based payment arrangement, nonvested award, cost not yet recognized, recognition not probable       $ 2,500  
Options to purchase common stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unvested award, period for recognition       1 year 5 months 26 days  
Shares reserved for future issuance (in shares)       3,901,706 5,384,760
2017 Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized (in shares)       412,099  
2020 Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Annual percentage increase in shares authorized       4.00%  
Number of additional shares authorized (in shares)   1,622,188 1,273,643 3,146,054  
Vesting period       4 years  
Contractual term       10 years  
Options granted in period (in shares)       3,489,607  
Number of shares available for future grants (in shares)   405,547   455,852  
2020 Plan | Subsequent Event          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of additional shares authorized (in shares) 781,748        
Number of shares available for future grants (in shares) 195,437        
Employee Stock Purchase Plan Twenty Twenty Member          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Issuance of common stock under the employee stock purchase plan (in shares)       11,806  
Shares reserved for future issuance (in shares)       1,641,602