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STOCK BASED COMPENSATION - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Apr. 03, 2021
Mar. 28, 2020
Share-based Payment Arrangement [Abstract]    
Allocated Share-based Compensation Expense $ 3.4 $ 1.9
Weighted average period for recognition 1 year 8 months 12 days  
Unrecognized non-cash stock-based compensation expense $ 33.2