Quarterly report pursuant to Section 13 or 15(d)

Revenue (Disaggregation of Revenue) (Details)

v3.22.1
Revenue (Disaggregation of Revenue) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers $ 4,940 $ 5,820
North America    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 3,278 3,938
Europe    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 1,378 1,621
Asia    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 284 261
Software licenses and appliances    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 111 108
Professional services and other    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 381 733
Total service    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 4,829 5,712
Subscription, maintenance and support    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 4,448 4,979
Subscription and support    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 2,655 2,315
Maintenance and support    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers $ 1,793 $ 2,664