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 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers $ 5,867 $ 9,334 $ 11,687 $ 15,561
North America        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 3,710 7,513 7,648 11,563
Europe        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 303 1,616 1,924 3,490
Asia        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 1,854 205 2,115 508
Software licenses and appliances        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 138 4,061 246 5,601
Subscription, maintenance and support        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 5,082 4,673 10,061 8,833
Professional services and other        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 647 600 1,380 1,127
Total service        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers $ 5,729 $ 5,273 $ 11,441 $ 9,960