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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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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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