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Segment Reporting - Narrative (Details) - Revenue Benchmark | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Mobile connectivity | Mobile Comm Product Sales | Product Concentration Risk |  |
Segment Reporting Information [Line Items] |  |
Percent of consolidated net sales | 16.00% | 18.00%
Mobile connectivity | VSAT Airtime Service Sales | Product Concentration Risk |  |
Segment Reporting Information [Line Items] |  |
Percent of consolidated net sales | 51.00% | 53.00%
Inertial navigation | FOG System Sales | Product Concentration Risk |  |
Segment Reporting Information [Line Items] |  |
Percent of consolidated net sales | 14.00% | 14.00%
Inertial navigation | TACNAV | Product Concentration Risk |  |
Segment Reporting Information [Line Items] |  |
Percent of consolidated net sales | 12.00% | 3.00%
Non-US | Geographic Concentration Risk |  |
Segment Reporting Information [Line Items] |  |
Percent of consolidated net sales | 62.00% | 58.00%
Singapore | Geographic Concentration Risk |  |
Segment Reporting Information [Line Items] |  |
Percent of consolidated net sales | 10.00% | 11.00%

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