Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Details)

v3.19.2
Revenue Recognition (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Disaggregation of Revenue [Line Items]        
Net sales $ 50,676 $ 43,914 $ 95,534 $ 84,466
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 45,784 40,111 $ 85,974 75,973
Software - security and highly interdependent with support        
Disaggregation of Revenue [Line Items]        
Net sales 1,727 1,493 3,620 3,596
Maintenance, support and other services revenue        
Disaggregation of Revenue [Line Items]        
Net sales $ 3,165 $ 2,310 $ 5,940 $ 4,897