Business Segments (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Revenue Information by Geographic Region

Revenue information shown by geographic region, based on the sales destination, is as follows:

	Three Months Ended				Six Months Ended
	June 30, 2018		July 1, 2017		June 30, 2018		July 1, 2017
United States	$	5,114	$	5,882	$	9,974	$	11,586
Europe		2,226		1,840		4,660		3,775
Rest of Americas		656		555		1,308		1,164
Asia/Pacific Rim		2,308		1,725		3,871		3,960
	$	10,304	$	10,002	$	19,813	$	20,485