Quarterly report pursuant to Section 13 or 15(d)

Revenue (Disaggregation of Revenue) (Details)

v3.21.2
Revenue (Disaggregation of Revenue) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers $ 6,425 $ 6,630 $ 18,112 $ 22,191
North America        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 4,290 4,238 11,938 15,801
Europe        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 1,850 2,106 5,325 5,596
Asia        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 285 286 849 794
Software licenses and appliances        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 742 887 1,091 6,736
Subscription, maintenance and support        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 5,080 5,010 15,038 13,595
Professional services and other        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 603 733 1,983 1,860
Total service        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers $ 5,683 $ 5,743 $ 17,021 $ 15,455