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SHARE-BASED COMPENSATION- Stock Warrants (Details) - USD ($)
12 Months Ended
Dec. 30, 2018
Dec. 31, 2017
Dec. 25, 2016
Dec. 27, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]        
Exercised 86,053 13,800 87,655  
Warrant        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation cost related to stock awards $ 0 $ 0 $ 0  
Unamortized stock compensation expense $ 0      
Unamortized stock compensation expense, recognition period 0 years      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]        
Weighted-average fair value of warrants     $ 2.48  
Weighted-average risk-free interest rate     0.60%  
Weighted-average dividend yield     100.00%  
Weighted-average volatility factor     43.20%  
Weighted-average expected life     3 years  
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]        
Warrants outstanding at beginning of period (in shares) 123,984 123,984 133,833  
Granted 0 0 32,250  
Exercised (30,768) 0 (42,099)  
Expired 0 0 0  
Warrants outstanding at ending of period (in shares) 93,216 123,984 123,984 133,833
Warrants exercisable (in shares) 93,216 123,984    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price [Abstract] [Abstract]        
Warrants outstanding at beginning of period (in dollars per share) $ 11.51 $ 11.51 $ 10.21  
Granted 0.00 0.00 16.80  
Exercised 11.27 0.00 11.42  
Expired 0.00 0.00 0.00  
Warrants outstanding at ending of period (in dollars per share) 11.59 11.51 $ 11.51 $ 10.21
Warrants exercisable (in dollars per share) $ 11.59 $ 11.51    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Additional Disclosures [Abstract]        
Warrants outstanding, weighted remaining contractual life 1 year 3 months 11 days 2 years 2 months 9 days 2 years 9 months 22 days 3 years 6 months 15 days
Warrants exercisable, weighted remaining contractual life 1 year 3 months 11 days 2 years 2 months 9 days    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Intrinsic Value [Abstract]        
Warrants outstanding at beginning of period $ 577,000 $ 532,000 $ 634,000  
Warrants outstanding at ending of period 805,000 577,000 $ 532,000 $ 634,000
Warrants exercisable, total intrinsic value $ 805,000 $ 577,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]        
Nonvested, number of warrants 0 0    
Nonvested warrants, weighted average grant date fair value $ 0.00 $ 0.00    
Conversion of stock, shares issued 16,623 0 17,910  
Exercised 30,768 0 42,099