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Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2021
Feb. 23, 2022
Jun. 30, 2021
Document Information [Line Items]      
Entity Central Index Key 0001173489    
Entity Registrant Name CEVA INC    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2021    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
Document Transition Report false    
Entity File Number 000-49842    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 77-0556376    
Entity Address, Address Line One 15245 Shady Grove Road, Suite 400    
Entity Address, City or Town Rockville    
Entity Address, State or Province MD    
Entity Address, Postal Zip Code 20850    
City Area Code 240    
Local Phone Number 308-8328    
Title of 12(b) Security Common Stock, $.001 per share    
Trading Symbol CEVA    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 787,381,106
Entity Common Stock, Shares Outstanding   23,204,024  
Auditor Name KOST FORER GABBAY & KASIERER    
Auditor Location Tel-Aviv, Israel    
Auditor Firm ID 42    
ICFR Auditor Attestation Flag true