Business Segments (Tables)

9 Months Ended

Sep. 26, 2020

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 26, 2020		September 28, 2019		September 26, 2020		September 28, 2019
Cyclo G6	$	2,776	$	2,962	$	7,812	$	9,419
Retina		4,429		5,788		11,171		16,635
Other(1)		1,598		1,914		5,060		5,631
Total revenues	$	8,803	$	10,664	$	24,043	$	31,685
(1) Includes service contract revenues of $302 and $437 and $929 and $1,041 recognized during the three and nine months ended September 26, 2020 and September 28, 2019, 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 26, 2020		September 28, 2019		September 26, 2020		September 28, 2019
United States	$	5,269	$	5,833	$	12,881	$	16,362
Europe		1,913		2,112		5,316		7,176
Rest of Americas		599		735		1,221		2,107
Asia/Pacific Rim		1,022		1,984		4,625		6,040
Total revenues	$	8,803	$	10,664	$	24,043	$	31,685