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RETIREMENT SAVINGS PLANS (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 29, 2019
Dec. 30, 2018
401(K) Plan    
Employer contribution rate, percent of employee contributions 25.00% 25.00%
Employee contribution rate, maximum percentage of employee earnings subject to employer matching 4.00% 4.00%
Employee contributions $ 570 $ 469
Employer match $ 113 $ 76
Non-Qualified Deferred Compensation Plan    
Employer contribution rate, percent of employee contributions 25.00% 25.00%
Employee contribution rate, maximum percentage of employee earnings subject to employer matching 4.00% 4.00%
Declared interest rate 6.00% 6.00%
Employee contributions $ 47 $ 36
Employer match and interest 6 17
Distributions $ 32 $ 30