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SHARE-BASED COMPENSATION (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 28, 2020
Jun. 30, 2019
Jun. 28, 2020
Jun. 30, 2019
Dec. 29, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options converted       22,240  
Shares outstanding 10,306,986   10,306,986   10,309,236
Employee Stock Option          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share based compensation expense $ 200,000 $ 200,000 $ 400,000 $ 500,000  
Unamortized stock compensation expense 1,300,000   $ 1,300,000    
Unamortized stock compensation expense, recognition period     2 years 4 months 24 days    
Shares issued in period       9,298  
Restricted stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share based compensation expense $ 100,000 100,000 $ 100,000 $ 100,000  
Shares outstanding 18,000   18,000   27,000
Granted (in dollars per share)     $ 28.61    
Warrant          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share based compensation expense $ 0 $ 0      
Non-option equity instruments, nonvested, number of shares 0   0   0
Shares issued in period       423  
Options converted       1,020