Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Disaggregation of Revenue (Details)

v3.20.4
Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Disaggregation of Revenue [Line Items]                    
Net sales $ 71,445 $ 60,919 $ 56,586 $ 62,618 $ 60,862 $ 52,363 $ 50,676 $ 44,858 $ 251,568 $ 208,759
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 terms on invoiced amount                 60 days  
Hardware, software and other products                    
Disaggregation of Revenue [Line Items]                    
Net sales                 $ 230,462 189,335
Software - security and highly interdependent with support                    
Disaggregation of Revenue [Line Items]                    
Net sales                 8,266 7,186
Maintenance, support and other services revenue                    
Disaggregation of Revenue [Line Items]                    
Net sales                 $ 12,840 $ 12,238