Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v2.4.1.9
Document and Entity Information (USD $)
12 Months Ended
Dec. 31, 2014
Mar. 26, 2015
Jun. 30, 2014
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2014    
Document Fiscal Year Focus 2014    
Document Fiscal Period Focus FY    
Trading Symbol OGXI    
Entity Registrant Name ONCOGENEX PHARMACEUTICALS, INC.    
Entity Central Index Key 0000949858    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Smaller Reporting Company    
Entity Common Stock, Shares Outstanding   22,679,086dei_EntityCommonStockSharesOutstanding  
Entity Public Float     $ 48,992,133dei_EntityPublicFloat