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STOCKHOLDERS' EQUITY - Changes to the Unvested Stock Options (Details) - Performance Restricted Stock Units [Member]
12 Months Ended
Jan. 03, 2020
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Non-vested performance shares, beginning balance | shares 147,900 [1]
Non-vested performance shares, granted | shares 58,100 [1]
Non-vested performance shares, vested | shares (55,200) [1]
Non-vested performance shares, performance unit adjustments | shares (44,200) [1],[2]
Non-vested performance shares, canceled | shares 0 [1]
Non-vested performance shares, ending balance | shares 106,600 [1]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]  
Beginning balance, weighted average grant date value | $ / shares $ 47.73
Granted, weighted average grant date fair value | $ / shares 62.00
Vested, weighted average grant date fair value | $ / shares 17.40
Performance unit adjustments, weighted average grant date fair value | $ / shares 48.61
Canceled, weighted average grant date fair value | $ / shares 0
Ending balance, weighted average grant date fair value | $ / shares $ 70.84
[1] All non-vested stock performance units are expected to vest.
[2] Adjustments based on final evaluations for non-vested performance stock units.