Revenues - Schedule of Revenues by Geographical Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 3,143	$ 3,443	$ 6,644	$ 7,217
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,917	3,178	6,099	6,374
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	79	73	207	230
Asia Pacific and Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	59	57	174	178
Middle East [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 88	$ 135	$ 164	$ 435