Annual report pursuant to Section 13 and 15(d)

Concentrations (Details)

v3.20.1
Concentrations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Concentration Risk [Line Items]    
Cash and cash equivalents $ 23,964 $ 39,154
Foreign    
Concentration Risk [Line Items]    
Cash and cash equivalents $ 10,500  
Customer Concentration Risk | Sales Revenue    
Concentration Risk [Line Items]    
Concentration risk 21.00% 18.00%
Customer Concentration Risk | Sales Revenue | Connectivity    
Concentration Risk [Line Items]    
Concentration risk 38.00% 35.00%
Customer Concentration Risk | Accounts Receivable | Connectivity    
Concentration Risk [Line Items]    
Concentration risk 17.00% 16.00%