Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2018
Sep. 21, 2018
Dec. 29, 2017
Document and Entity Information [Abstract]      
Entity Registrant Name DelMar Pharmaceuticals, Inc.    
Entity Central Index Key 0001498382    
Current Fiscal Year End Date --06-30    
Trading Symbol DMPI    
Amendment Flag false    
Document Type 10-K    
Document Period End Date Jun. 30, 2018    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Well-known Seasoned Issuer No    
Entity Public Float     $ 22.8
Entity Common Stock, Shares Outstanding   22,409,053