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BASIS OF PRESENTATION, ORGANIZATION AND OPERATIONS OF THE COMPANY - Liquidity (Details) - USD ($)
9 Months Ended
Jul. 28, 2017
Sep. 29, 2017
Dec. 30, 2016
Sep. 30, 2016
Jan. 01, 2016
Basis of Presentation          
Goodwill   $ 40,056,000 $ 21,947,000    
Liquidity          
Cash and cash equivalents   $ 5,603,000 $ 22,668,000 $ 18,587,000 $ 16,487,000
Minimum period over which cash and cash equivalents on hand, cash generated by operating activities and funds available under line of credit will be sufficient to finance operating activities   12 months      
Integral Analytics, Inc          
Basis of Presentation          
Goodwill $ 18,251,000        
Liquidity          
Cash paid at closing $ 15,000,000