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Segment Reporting Narrative (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Mobile connectivity | Mobile Comm Product Sales        
Segment Reporting Information [Line Items]        
Percent of consolidated net sales 18.00% 22.00% 18.00% 21.00%
Mobile connectivity | VSAT Airtime Service Sales        
Segment Reporting Information [Line Items]        
Percent of consolidated net sales 55.00% 48.00% 54.00% 49.00%
Inertial navigation | FOG System Sales        
Segment Reporting Information [Line Items]        
Percent of consolidated net sales 16.00% 16.00% 15.00% 15.00%
Non-US        
Segment Reporting Information [Line Items]        
Percent of consolidated net sales 57.00% 51.00% 58.00% 55.00%
SINGAPORE        
Segment Reporting Information [Line Items]        
Percent of consolidated net sales     10.00%