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SHARE-BASED COMPENSATION - Summary of Warrant Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 28, 2020
Jun. 30, 2019
Dec. 29, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]      
Number of warrants, exercisable     64,482
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Weighted Average Exercise Price [Roll Forward]      
Exercisable warrants, weighted average exercise price (in dollars per share)     $ 13.84
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Intrinsic Value [Roll Forward]      
Options converted   22,240  
Warrant      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued in period   423  
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]      
Number of warrants, outstanding, beginning balance (in shares) 64,482    
Number of warrants, outstanding, ending balance (in shares) 25,862   64,482
Number of warrants, exercisable 25,862    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Weighted Average Exercise Price [Roll Forward]      
Outstanding warrants, weighted average exercise price, beginning balance (in dollars per share) $ 13.84    
Outstanding warrants, weighted average exercise price, ending balance (in dollars per share) 16.80   $ 13.84
Exercisable warrants, weighted average exercise price (in dollars per share) $ 16.80    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Warrants outstanding, weighted average remaining contractual life 10 months 24 days   9 months 18 days
Exercisable warrants, weighted average remaining contractual life 10 months 24 days   9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Intrinsic Value [Roll Forward]      
Outstanding warrants, intrinsic value, beginning balance $ 473    
Outstanding warrants, intrinsic value, ending balance 0   $ 473
Exercisable warrants, intrinsic price $ 0   $ 473
Options converted   1,020  
Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued in period   9,298