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Segment Reporting (Tables)
12 Months Ended
Dec. 31, 2020
Segment Reporting [Abstract]  
Schedule of reporting segments
Net sales and operating income (loss) for the Company's reporting segments and the Company's loss from continuing operations before income tax expense (benefit) for the years ended December 31, 2020 and 2019 were as follows:
For the year ended December 31,
20202019
Net sales:
Mobile connectivity$119,453 $122,015 
Inertial navigation39,280 35,878 
Consolidated net sales$158,733 $157,893 
Operating (loss) income:
Mobile connectivity (1)
$(10,071)$(5,569)
Inertial navigation4,799 2,961 
Subtotal(5,272)(2,608)
Unallocated, net(17,665)(18,488)
Loss from operations(22,937)(21,096)
Net interest and other income1,171 1,084 
Loss from continuing operations before income tax expense (benefit)$(21,766)$(20,012)
(1) Includes an impairment charge of $10,490 for the KVH Media Group reporting unit within the mobile connectivity segment as of December 31, 2020.

Depreciation expense and amortization expense for the Company's segments are presented in the table that follows for the periods presented:
For the year ended December 31,
20202019
Depreciation expense:
Mobile connectivity$8,726 $7,084 
Inertial navigation1,325 1,155 
Unallocated608 559 
Total consolidated depreciation expense$10,659 $8,798 
Amortization expense:
Mobile connectivity$1,004 $980 
Inertial navigation— — 
Unallocated— — 
Total consolidated amortization expense$1,004 $980