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v3.19.3.a.u2

Summary of Significant Accounting Policies - Research and Development (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Research and Development |  |
Customer-funded service sales | $ 5,816 | $ 4,563
Customer-funded costs included in costs of service sales | $ 4,373 | $ 3,087

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- Definition Customer Funded Costs Of Goods Sold + References No definition available. + Details
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Namespace Prefix: | kvhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Customer Funded Sales Revenue, Services, Net + References No definition available. + Details
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Namespace Prefix: | kvhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration