Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Jun. 30, 2019
Sep. 06, 2019
Dec. 31, 2018
Document and Entity Information [Abstract]      
Entity Registrant Name DelMar Pharmaceuticals, Inc.    
Entity Central Index Key 0001498382    
Amendment Flag false    
Current Fiscal Year End Date --06-30    
Document Type 10-K    
Document Period End Date Jun. 30, 2019    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2019    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Current Reporting Status Yes    
Entity Small Business true    
Entity Shell Company false    
Entity Emerging Growth Company false    
Entity Ex Transition Period false    
Entity Public Float     $ 8,400,000
Entity Common Stock, Shares Outstanding   11,388,483  
Entity File Number 001-37823    
Entity Interactive Data Current Yes    
Entity Incorporation State Country Code NV