Quarterly report pursuant to Section 13 or 15(d)

Concentrations (Details)

v3.20.2
Concentrations (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Concentration Risk [Line Items]      
Cash and cash equivalents $ 54,193   $ 23,964
Sales Revenue Segment | Customer Concentration Risk      
Concentration Risk [Line Items]      
Southwest Airlines, concentration risk, percent 20.00% 21.00%  
Sales Revenue Segment | Customer Concentration Risk | Connectivity      
Concentration Risk [Line Items]      
Southwest Airlines, concentration risk, percent 38.00% 39.00%  
Accounts Receivable | Customer Concentration Risk      
Concentration Risk [Line Items]      
Southwest Airlines, concentration risk, percent 16.00%   17.00%
Foreign Subsidiaries      
Concentration Risk [Line Items]      
Cash and cash equivalents $ 4,800