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Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income (loss)	$ (1,422)us-gaap_NetIncomeLoss	$ (1,123)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Provision for doubtful accounts	502us-gaap_ProvisionForDoubtfulAccounts	47us-gaap_ProvisionForDoubtfulAccounts
Depreciation and amortization	3,129us-gaap_DepreciationDepletionAndAmortization	1,693us-gaap_DepreciationDepletionAndAmortization
Deferred income taxes	(426)kvhi_DeferredIncomeTaxExpenseBenefitExcludingForeignCurrencyTranslationAdjustment	(289)kvhi_DeferredIncomeTaxExpenseBenefitExcludingForeignCurrencyTranslationAdjustment
Gain (Loss) on Disposition of Property Plant Equipment	39us-gaap_GainLossOnDispositionOfAssets1	0us-gaap_GainLossOnDispositionOfAssets1
Loss on derivative instruments	13kvhi_LossOnInterestRateSwaps	21kvhi_LossOnInterestRateSwaps
Compensation expense related to stock-based awards and employee stock purchase plan	958us-gaap_ShareBasedCompensation	1,003us-gaap_ShareBasedCompensation
Changes in operating assets and liabilities:
Accounts receivable	734us-gaap_IncreaseDecreaseInAccountsReceivable	(698)us-gaap_IncreaseDecreaseInAccountsReceivable
Inventories	(1,214)us-gaap_IncreaseDecreaseInInventories	(459)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other assets	(565)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	(984)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Other non-current assets	(428)us-gaap_IncreaseDecreaseInOtherOperatingAssets	245us-gaap_IncreaseDecreaseInOtherOperatingAssets
Accounts payable	(813)us-gaap_IncreaseDecreaseInAccountsPayable	(421)us-gaap_IncreaseDecreaseInAccountsPayable
Deferred revenue	5,418us-gaap_IncreaseDecreaseInDeferredRevenue	907us-gaap_IncreaseDecreaseInDeferredRevenue
Accrued expenses	(2,710)us-gaap_IncreaseDecreaseInAccruedLiabilities	(503)us-gaap_IncreaseDecreaseInAccruedLiabilities
Other long-term liabilities	(11)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities	(10)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
Net cash provided by (used in) operating activities	3,204us-gaap_NetCashProvidedByUsedInOperatingActivities	(571)us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows from investing activities:
Capital expenditures	(1,270)us-gaap_PaymentsToAcquireProductiveAssets	(771)us-gaap_PaymentsToAcquireProductiveAssets
Purchases of marketable securities	(9,625)us-gaap_PaymentsToAcquireMarketableSecurities	(9,287)us-gaap_PaymentsToAcquireMarketableSecurities
Maturities and sales of marketable securities	3,095us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities	14,256us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities
Net cash (used in) provided by investing activities	(7,800)us-gaap_NetCashProvidedByUsedInInvestingActivities	4,198us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash flows from financing activities:
Repayments of long-term debt	(1,543)us-gaap_RepaymentsOfLongTermDebt	(314)us-gaap_RepaymentsOfLongTermDebt
Payments of employee restricted stock withholdings	344kvhi_PaymentsOfEmployeeRestrictedStockWithholdings	481kvhi_PaymentsOfEmployeeRestrictedStockWithholdings
Proceeds From Stock Options Exercised and Employee Stock Purchase Plan	197kvhi_ProceedsFromStockOptionsExercisedAndEmployeeStockPurchasePlan	129kvhi_ProceedsFromStockOptionsExercisedAndEmployeeStockPurchasePlan
Net cash used in financing activities	(1,690)us-gaap_NetCashProvidedByUsedInFinancingActivities	(666)us-gaap_NetCashProvidedByUsedInFinancingActivities
Effect of exchange rate changes on cash and cash equivalents	(624)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents	(36)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net (decrease) increase in cash and cash equivalents	(6,910)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease	2,925us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of period	25,289us-gaap_CashAndCashEquivalentsAtCarryingValue	9,358us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of period	$ 18,379us-gaap_CashAndCashEquivalentsAtCarryingValue	$ 12,283us-gaap_CashAndCashEquivalentsAtCarryingValue

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- Definition

The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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- Definition

Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.5)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 5

-Article 5

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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