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Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 31, 2017 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020 | Jan. 01, 2017
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  | $ 32 | $ 40 |  |
Amortization expense |  | $ 280 | $ 241 | $ 556 | $ 489 |  |
KVH Media Group |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  |  | $ 1,758 |
Goodwill, impairment charge |  |  |  |  |  | $ 8,732 |
Intellectual property |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Intangible assets, useful lives |  |  |  | 7 years |  |  |
Headland Media Limited | Subscriber relationships |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Intangible assets, useful lives |  |  |  | 10 years |  |  |
Headland Media Limited | Distribution rights |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Intangible assets, useful lives |  |  |  | 1 year |  | 15 years |
Q1 2017 Acquisition |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  | $ 378 |  |  |
Contingent consideration, value, high |  |  |  |  |  |  | $ 114
Q1 2017 Acquisition | Subscriber relationships |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Intangible assets, useful lives | 10 years |  |  |  |  |  |
Finite-lived intangible assets acquired | $ 100 |  |  |  |  |  |

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