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v3.21.1

Segment Reporting - Net Sales and Operating Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Segment Reporting Information [Line Items] |  |
Net sales | $ 42,292 | $ 36,568
Operating (loss) income | (3,607) | (7,648)
Net interest and other (expense) income | (574) | 1,811
Loss before income tax (benefit) expense | (4,181) | (5,837)
Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Operating (loss) income | 1,693 | (3,120)
Operating Segments | Mobile connectivity |  |
Segment Reporting Information [Line Items] |  |
Net sales | 30,507 | 28,896
Operating (loss) income | (397) | (2,299)
Operating Segments | Inertial navigation |  |
Segment Reporting Information [Line Items] |  |
Net sales | 11,785 | 7,672
Operating (loss) income | 2,090 | (821)
Unallocated |  |
Segment Reporting Information [Line Items] |  |
Operating (loss) income | $ (5,300) | $ (4,528)

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