Business Segments (Tables)

9 Months Ended

Sep. 28, 2019

Segment Reporting [Abstract]

Schedule of Revenue Information by Product

Revenue information shown by product group is as follows:

	Three Months Ended				Nine Months Ended
(in thousands)	September 28, 2019		September 29, 2018		September 28, 2019		September 29, 2018
G6	$	2,962	$	2,860	$	9,419	$	8,715
Retina		5,788		6,672		16,635		17,160
Other(1)		1,914		1,788		5,631		5,258
Total revenues	$	10,664	$	11,320	$	31,685	$	31,133
(1) Incudes service contract revenues of $437 and $388 and $1,041 and $985 recognized during the three and nine months ended September 28, 2019 and September 29, 2018, respectively. Other also includes revenues from paid service, royalty, freight and legacy G probes.

Revenue Information by Geographic Region

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

	Three Months Ended				Nine Months Ended
(in thousands)	September 28, 2019		September 29, 2018		September 28, 2019		September 29, 2018
United States	$	5,833	$	6,182	$	16,362	$	16,156
Europe		2,112		2,020		7,176		6,680
Rest of Americas		735		554		2,107		1,862
Asia/Pacific Rim		1,984		2,564		6,040		6,435
Total revenues	$	10,664	$	11,320	$	31,685	$	31,133