Other Operating Income and Expenses, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Other Operating Income and Expenses, Net [Abstract]
(Gain) loss on currency exchanges	$ (8)	$ 17
Amortization of intangibles	76	76
Retirement expenses	54	18
Vendor settlement	(355)	0
Insurance proceeds	(48)	0
Miscellaneous (income) expense	40	(59)
Other operating (income) expense, net	$ (241)	$ 52