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Document And Entity Information - USD ($)
 12 Months Ended
Jun. 30, 2019
Oct. 08, 2019
Dec. 31, 2018
Document And Entity Information [Abstract]      
Entity Registrant Name NET 1 UEPS TECHNOLOGIES INC    
Entity Central Index Key 0001041514    
Document Type 10-K    
Document Period End Date Jun. 30, 2019    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --06-30    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Amendment Flag false    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 174,172,483
Entity Common Stock, Shares Outstanding   56,568,425