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Taxes on Income - Additional Information (Detail) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Taxes [Line Items] |  |  |
Effective income tax rate | 140.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 11.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 13.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Increase in valuation allowance | $ 3,404,000 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount |  |
Unrecognized tax benefits | 2,859,000 us-gaap_UnrecognizedTaxBenefits | 3,563,000 us-gaap_UnrecognizedTaxBenefits | 3,520,000 us-gaap_UnrecognizedTaxBenefits
Accrued interest related to unrecognized tax benefits | 39,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued | 226,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued |
Accrue penalties related to unrecognized tax benefits | 0 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued | 0 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued |
Net operating loss carryforwards, federal | 3,929,000 ceva_FederalNetOperatingLossCarryForward |  |
Excess tax benefits from stock option exercises | 3,876,000 ceva_FederalNetOperatingLossCarryForwardExcessTaxBenefits |  |
Loss carryforwards begin to expire | 2030 |  |
Income not eligible for Approved Enterprise benefits |  |  |
Income Taxes [Line Items] |  |  |
Effective income tax rate | 26.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_IncomeTaxAuthorityAxis = ceva_IncomeNotEligibleForApprovedEnterpriseBenefitsMember |  |
Israel |  |  |
Income Taxes [Line Items] |  |  |
Effective income tax rate | 25.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_StatementGeographicalAxis = country_IL |  |
Increase in income tax rate | 26.50%ceva_CorporateTaxRate / us-gaap_StatementGeographicalAxis = country_IL |  |
Israel | Foreign ownership exceeds 90% |  |  |
Income Taxes [Line Items] |  |  |
Effective income tax rate | 10.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_IncomeTaxAuthorityAxis = ceva_PercentageOwnershipOneMember / us-gaap_StatementGeographicalAxis = country_IL |  |
Israel | Foreign ownership exceeds 49% |  |  |
Income Taxes [Line Items] |  |  |
Effective income tax rate | 20.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_IncomeTaxAuthorityAxis = ceva_PercentageOwnershipTwoMember / us-gaap_StatementGeographicalAxis = country_IL |  |
Israel | Minimum |  |  |
Income Taxes [Line Items] |  |  |
Tax exemption period, undistributed income | 2 years |  |
Israel | Maximum |  |  |
Income Taxes [Line Items] |  |  |
Tax exemption period, undistributed income | 10 years |  |
Ireland |  |  |
Income Taxes [Line Items] |  |  |
Effective income tax rate | 12.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_StatementGeographicalAxis = country_IE |  |
Open tax years | Subject to review by the applicable taxing authorities for the Irish subsidiary, are 2010 and subsequent years. |  |
Net operating loss carryforwards, foreign | 63,422,000 ceva_ForeignNetOperatingLossCarryForwards / us-gaap_StatementGeographicalAxis = country_IE |  |
Ireland | Interest income |  |  |
Income Taxes [Line Items] |  |  |
Effective income tax rate | 25.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / ceva_IncomeTaxesAxis = us-gaap_InterestIncomeMember / us-gaap_StatementGeographicalAxis = country_IE |  |
France |  |  |
Income Taxes [Line Items] |  |  |
Effective income tax rate | 33.33%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_StatementGeographicalAxis = country_FR |  |
Open tax years | Subject to review by the applicable taxing authorities for the French subsidiaries, are 2010 and subsequent years. |  |
Net operating loss carryforwards, foreign | 2,105,000 ceva_ForeignNetOperatingLossCarryForwards / us-gaap_StatementGeographicalAxis = country_FR |  |
California state |  |  |
Income Taxes [Line Items] |  |  |
Loss carryforwards begin to expire | 2015 |  |
Net operating loss carryforwards | 6,315,000 ceva_NetOperatingLossCarryforwards / us-gaap_StatementGeographicalAxis = stpr_CA |  |
Excess tax benefits from stock option exercises | $ 3,424,000 ceva_NetOperatingLossCarryForwardExcessTaxBenefits / us-gaap_StatementGeographicalAxis = stpr_CA |  |

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