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INFORMATION CONCERNING PRODUCT LINES, GEOGRAPHIC INFORMATION, ACCOUNTS RECEIVABLE AND REVENUE CONCENTRATION - Schedule of Revenue by Shipment Destination (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Jan. 01, 2017
Jan. 03, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenue $ 12,149 $ 11,421 $ 18,956
Asia Pacific      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenue 5,810 7,131 12,650
Europe      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenue 2,015 1,386 1,859
North America      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenue 4,324 2,904 $ 4,447
South Korea      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenue $ 2,100 $ 3,600  
Revenue percentage 17.00% 31.00%  
United States      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenue $ 4,200 $ 2,800  
Revenue percentage 34.00% 25.00%