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Segment Reporting (Tables) | 12 Months Ended
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Dec. 31, 2018
Segment Reporting [Abstract] |
Schedule of reporting segments | Net sales and operating income (loss) for the Company's reporting segments and the Company's loss before income tax expense for the years ended December 31, 2018, 2017, and 2016 were as follows:
| For the year ended December 31,
| 2018 |  | 2017 |  | 2016
Net sales: |  |  |  |  |
Mobile connectivity | $ | 133,658 |  |  | $ | 132,227 |  |  | $ | 141,507 |
Inertial navigation | 37,103 |  |  | 27,861 |  |  | 34,615 |
Consolidated net sales | $ | 170,761 |  |  | $ | 160,088 |  |  | $ | 176,122 |
Operating income (loss): |  |  |  |  |
Mobile connectivity | $ | 4,163 |  |  | $ | 7,334 |  |  | $ | 10,041 |
Inertial navigation | 4,917 |  |  | 556 |  |  | 5,272 |
Subtotal | 9,080 |  |  | 7,890 |  |  | 15,313 |
Unallocated, net | (16,244 | ) |  | (16,654 | ) |  | (16,635 | )
Loss from operations | (7,164 | ) |  | (8,764 | ) |  | (1,322 | )
Net interest and other income (expense) | (503 | ) |  | (1,174 | ) |  | (648 | )
Loss before income tax expense | $ | (7,667 | ) |  | $ | (9,938 | ) |  | $ | (1,970 | )
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,
| 2018 |  | 2017 |  | 2016
Depreciation expense: |  |  |  |  |
Mobile connectivity | $ | 7,224 |  |  | $ | 5,720 |  |  | $ | 6,084 |
Inertial navigation | 1,048 |  |  | 928 |  |  | 1,063 |
Unallocated | 538 |  |  | 77 |  |  | 461 |
Total consolidated depreciation expense | $ | 8,810 |  |  | $ | 6,725 |  |  | $ | 7,608 |
Amortization expense: |  |  |  |  |
Mobile connectivity | $ | 4,047 |  |  | $ | 4,312 |  |  | $ | 4,956 |
Inertial navigation | — |  |  | — |  |  | — |
Unallocated | — |  |  | — |  |  | — |
Total consolidated amortization expense | $ | 4,047 |  |  | $ | 4,312 |  |  | $ | 4,956 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599 + Details
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