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Share Buyback Program (Details) shares in Thousands	6 Months Ended
	Jun. 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

X

- Definition

Share buyback program.

+ References

No definition available.

+ Details

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Namespace Prefix:	kvhi_
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X

- 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

X

- 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

X

- 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