Revenue (Tables)

12 Months Ended

Dec. 31, 2020

Revenue [Abstract]

Disaggregation of Revenue

Revenues by product category and geography

The Company combines its products and services into three product categories and three geographic regions, based on customer location, as follows (in thousands):

	Year Ended  December 31,
	2020		2019		2018
Software licenses and appliances	$	6,762	$	4,903	$	5,814
Service
Subscription, maintenance and support	19,555		18,249		17,132
Professional services and other	2,755		2,210		2,067
Total service	22,310		20,459		19,199
Total revenues	$	29,072	$	25,362	$	25,013

	Year Ended  December 31,
	2020		2019		2018
North America	$	20,073	$	16,588	$	16,639
Europe	7,693		7,527		6,453
Asia	1,306		1,247		1,921
Total	$	29,072	$	25,362	$	25,013