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Share Buyback Program (Details) shares in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2018 Program shares | Nov. 26, 2008 shares
Share Buyback Program (Textual) [Abstract] |  |
Common stock available for repurchase | shares | 341 | 1,000
Number of other repurchase programs outstanding | 0 |
Number of stock repurchase programs other expired | 0 |

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- Definition Share buyback program. + References No definition available. + Details
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Namespace Prefix: | kvhi_
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- Definition Stock repurchase program other expired number. + References No definition available. + Details
Name: | kvhi_StockRepurchaseProgramOtherExpiredNumber
Namespace Prefix: | kvhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Stock repurchase program other outstanding number. + References No definition available. + Details
Name: | kvhi_StockRepurchaseProgramOtherOutstandingNumber
Namespace Prefix: | kvhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | instant