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Reconciliation Between Effective Tax Rate and U.S. Statutory Rate (Parenthetical) (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Basic and diluted earnings per share amounts of the benefit resulting from the "Approved Enterprise" and "Benefited Enterprise" status	$ 0.12	$ 0.13	$ 0.08

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- Definition

Earnings per share basic and diluted effect of foreign income tax adjustment reduced exempt.

+ References

No definition available.

+ Details

Name:	ceva_EarningsPerShareBasicAndDilutedEffectOfForeignIncomeTaxAdjustmentReducedExempt
Namespace Prefix:	ceva_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration