Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Details)

v3.19.1
Revenue Recognition (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Disaggregation of Revenue [Line Items]    
Net sales $ 44,858 $ 40,552
Deferred revenue balances $ 0  
Minimum    
Disaggregation of Revenue [Line Items]    
Payment terms on invoiced amount 30 days  
Maximum    
Disaggregation of Revenue [Line Items]    
Payment period 3 days  
Payment terms on invoiced amount 75 days  
Hardware, software and other products    
Disaggregation of Revenue [Line Items]    
Net sales $ 40,189 35,862
Software - security and highly interdependent with support    
Disaggregation of Revenue [Line Items]    
Net sales 1,892 2,103
Maintenance, support and other services revenue    
Disaggregation of Revenue [Line Items]    
Net sales $ 2,777 $ 2,587