SEGMENT INFORMATION - Unallocated Corporate Assets (Details) - USD ($)
Dec. 30, 2016
Jan. 01, 2016
Jan. 02, 2015
Dec. 27, 2013
Assets:        
Cash and cash equivalents $ 22,668,000 $ 16,487,000 $ 18,173,000 $ 6,661,000
Accounts Receivable, net 30,285,000 17,929,000    
Prepaid expenses 2,601,000 2,082,000    
Goodwill 21,947,000 16,097,000    
Other receivables 699,000 177,000    
Equipment and leasehold improvements, net 4,511,000 3,684,000    
Other 707,000 504,000    
Unallocated Corporate        
Assets:        
Cash and cash equivalents 22,660,000 14,385,000    
Accounts Receivable, net (590,000)      
Prepaid expenses 1,017,000 758,000    
Intercompany receivables 112,837,000 82,845,000    
Goodwill (3,000)      
Other receivables 55,000 49,000    
Equipment and leasehold improvements, net 1,869,000 2,231,000    
Investments in subsidiaries 23,130,000 23,130,000    
Other 99,000 53,000    
Total assets $ 161,074,000 $ 123,451,000