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v3.21.2

Segment Reporting - Deprecation and Amortization Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Segment Reporting Information [Line Items] |  |  |  |
Depreciation | $ 3,532 | $ 2,624 | $ 9,939 | $ 7,537
Amortization expense | 277 | 251 | 833 | 740
Operating Segments | Mobile connectivity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation | 2,963 | 2,160 | 8,263 | 6,159
Amortization expense | 277 | 251 | 833 | 740
Operating Segments | Inertial navigation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation | 397 | 318 | 1,165 | 934
Amortization expense | 0 | 0 | 0 | 0
Unallocated |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation | 172 | 146 | 511 | 444
Amortization expense | $ 0 | $ 0 | $ 0 | $ 0

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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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