Quarterly report pursuant to Section 13 or 15(d)

Cover Page

Cover Page - shares
3 Months Ended
Sep. 30, 2020
Nov. 09, 2020
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Entity File Number 001-39267  
Entity Registrant Name Benitec Biopharma Inc.  
Document Period End Date Sep. 30, 2020  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q1  
Entity Central Index Key 0001808898  
Current Fiscal Year End Date --06-30  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period true  
Entity Shell Company false  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 3940 Trust Way Hayward  
Entity Address, Country CA  
Entity Address, Postal Zip Code 94545  
City Area Code (510)  
Local Phone Number 780-0819  
Title of 12(b) Security Common stock  
Trading Symbol BNTC  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   4,405,469