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Document and Entity Information
Feb. 11, 2021
Cover [Abstract]  
Document Type 8-K
Document Period End Date Feb. 11, 2021
Entity Registrant Name ESSA Pharma Inc.
Entity Incorporation, State or Country Code A1
Entity File Number 001-37410
Entity Tax Identification Number 47-2569713
Entity Address, Address Line One Suite 720
Entity Address, Address Line Two 999 West Broadway
Entity Address, City or Town Vancouver
Entity Address, State or Province BC
Entity Address, Country CA
Entity Address, Postal Zip Code V5Z 1K5
City Area Code 778
Local Phone Number 331-0962
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Shares, no par value
Trading Symbol EPIX
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Entity Ex Transition Period false
Amendment Flag false
Entity Central Index Key 0001633932