Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Details)

v3.19.3
Revenue Recognition (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Disaggregation of Revenue [Line Items]        
Net sales $ 52,363 $ 47,923 $ 147,897 $ 132,389
Deferred revenue balances 0   $ 0  
Minimum        
Disaggregation of Revenue [Line Items]        
Payment terms on invoiced amount     30 days  
Maximum        
Disaggregation of Revenue [Line Items]        
Payment period     3 years  
Payment terms on invoiced amount     75 days  
Hardware, software and other products        
Disaggregation of Revenue [Line Items]        
Net sales 47,508 44,100 $ 133,482 120,073
Software - security and highly interdependent with support        
Disaggregation of Revenue [Line Items]        
Net sales 1,798 1,433 5,417 5,029
Maintenance, support and other services revenue        
Disaggregation of Revenue [Line Items]        
Net sales $ 3,057 $ 2,390 $ 8,998 $ 7,287