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Note 16 - Uncertain Tax Positions (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2019
Income Tax Benefit Resulting From Prior Year Tax Positions | $ 1,029 | $ 1,029
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions | $ 2,164 | $ 2,164

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- Definition The income tax benefit resulting from prior year tax positions. + References No definition available. + Details
Name: | ceva_IncomeTaxBenefitResultingFromPriorYearTaxPositions
Namespace Prefix: | ceva_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration