Segment Information

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

SEGMENT INFORMATION

2. SEGMENT INFORMATION

Revenue is attributed by geographic region based on ship-to location of the Company’s customers. The following table summarizes revenue by geographic region:

	Year Ended
	December 31,
	2021		2020
	(in thousands)
North America	$	3,671	$	3,189
Asia		349		405
Other		41		22
Total revenue	$	4,061	$	3,616

The following table summarizes sales by product type:

	Year Ended
	December 31,
	2021		2020
	(in thousands)
Optical	$	4,061	$	3,611
Core		-		5
Total revenue	$	4,061	$	3,616

All of our assets were located in the United States for the years ended December 31, 2021 and 2020.