Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Document and Entity Information [Abstract]    
Entity Registrant Name Telenav, Inc.  
Entity Central Index Key 0001474439  
Current Fiscal Year End Date --06-30  
Entity Filer Category Accelerated Filer  
Document Type 10-K  
Document Period End Date Jun. 30, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus FY  
Amendment Flag false  
Entity Common Stock, Shares Outstanding 44,870,602  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Public Float   $ 148