XML 14 R1.htm IDEA: XBRL DOCUMENT v3.20.2
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2020
Oct. 31, 2020
Document Information [Line Items]    
Entity Shell Company false  
Document Transition Report false  
Document Quarterly Report true  
Title of 12(b) Security Common Stock  
Trading Symbol CDLX  
Entity Incorporation, State or Country Code DE  
Entity Registrant Name CARDLYTICS, INC.  
Security Exchange Name NASDAQ  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2020  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity File Number 001-38386  
Entity Current Reporting Status Yes  
Document Fiscal Year Focus 2020  
Entity Interactive Data Current Yes  
Entity Ex Transition Period false  
Document Fiscal Period Focus Q3  
Entity Emerging Growth Company true  
Current Fiscal Year End Date --12-31  
Entity Central Index Key 0001666071  
Entity Common Stock, Shares Outstanding (in shares)   27,464,399
Entity Address, City or Town Atlanta  
Entity Address, Address Line One 675 Ponce de Leon Ave. NE, Ste 6000  
Entity Tax Identification Number 26-3039436  
Entity Address, State or Province GA  
Entity Address, Postal Zip Code 30308  
Local Phone Number 792-5802  
City Area Code (888)