Annual report pursuant to Section 13 and 15(d)

Revenue Revenue by Product Category and Geography (Details)

v3.19.3.a.u2
Revenue Revenue by Product Category and Geography (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
region
category
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax $ 25,362 $ 25,013 $ 28,167
Number Of Product Categories | category 3    
Number Of Geographic Regions | region 3    
North America      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax $ 16,588 16,639 20,494
Europe      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 7,527 6,453 6,914
Asia      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 1,247 1,921 759
Software license and appliances      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 4,903 5,814 5,982
Service      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 20,459 19,199 22,185
Subscription, maintenance and support      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 18,249 17,132 19,374
Professional services and other      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax $ 2,210 $ 2,067 $ 2,811