Sales by Geographic Region and Product Category - Schedule of Revenues by Geographical Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geography	$ 3,646	$ 3,554	$ 6,929	$ 7,296
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geography	3,243	3,227	6,281	6,558
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geography	175	195	244	312
Asia Pacific and Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geography	104	47	169	202
Middle East [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geography	$ 124	$ 85	$ 235	$ 224