Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2021
Mar. 31, 2022
Jun. 30, 2021
Document Information Line Items      
Entity Registrant Name CUENTAS, INC.    
Trading Symbol CUEN    
Document Type 10-K    
Current Fiscal Year End Date --12-31    
Entity Common Stock, Shares Outstanding   14,965,690  
Entity Public Float     $ 36,258,669
Amendment Flag false    
Entity Central Index Key 0001424657    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Well-known Seasoned Issuer No    
Document Period End Date Dec. 31, 2021    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
ICFR Auditor Attestation Flag false    
Document Annual Report true    
Document Transition Report false    
Entity File Number 333-148987    
Entity Incorporation, State or Country Code FL    
Entity Tax Identification Number 20-3537265    
Entity Address, Address Line One 235 Lincoln Rd    
Entity Address, Address Line Two Suite 210    
Entity Address, City or Town Miami Beach    
Entity Address, State or Province FL    
Entity Address, Postal Zip Code 33139    
City Area Code 800    
Local Phone Number 611-3622    
Title of 12(b) Security Common Stock, par value $0.001 per share    
Security Exchange Name NASDAQ    
Entity Interactive Data Current Yes    
Auditor Name Halperin Ilanit CPA    
Auditor Firm ID 6501    
Auditor Location Tel Aviv, Israel