Supplemental Disclosure Of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental Disclosure Of Cash Flows [Abstract]
Interest received	$ 381	$ 1	$ 1
Interest paid	680	716	568
Income taxes paid	190	166	$ 196
Noncash Transactions: NXP technology access	(473)	2,732
Noncash Transactions: NXP long-term liability	(375)	$ 2,600
Property, plant and equipment purchases that remain in accounts payable	$ 1,030