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. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 12,629	$ 12,149	$ 11,421
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	4,905	5,810	7,131
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	1,280	2,015	1,386
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	6,444	4,324	$ 2,904
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 1,800	$ 1,300
China | Total Revenue
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of total revenue	15.00%	11.00%
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 1,600	$ 1,500
Japan | Total Revenue
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of total revenue	12.00%	12.00%
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 6,400	$ 4,200
United States | Total Revenue
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of total revenue	50.00%	34.00%