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Note 11 - Derivatives and Hedging Activities - Fair Value of Outstanding Derivative Instruments (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Derivative Liabilities | $ 28 | $ 0
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Foreign Exchange Option Contracts [Member] |  |
Derivative Liabilities | 1 | 0
Derivatives Designated as Cash Flow Hedging Instruments [Member] | Foreign Exchange Forward Contracts [Member] |  |
Derivative Liabilities | $ 27 | $ 0

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- Definition Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into. + References No definition available. + Details
Name: | us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ceva_ForeignExchangeOptionContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ceva_ForeignExchangeForwardContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |