Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Summary of Outstanding Warrants (Detail)

v2.4.1.9
Common Stock - Summary of Outstanding Warrants (Detail) (USD $)
 3 Months Ended
Mar. 31, 2015
Series A Warrants [Member]  
Class of Warrant or Right [Line Items]  
Total Outstanding and Exercisable 2,779,932us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= ogxi_SeriesACommonStockWarrantsMember
Exercise price per unit of warrant $ 4.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= ogxi_SeriesACommonStockWarrantsMember
Expiration Date 2019-07
Series B Warrants [Member]  
Class of Warrant or Right [Line Items]  
Total Outstanding and Exercisable 670,269us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= ogxi_SeriesBCommonStockWarrantsMember
Exercise price per unit of warrant $ 4.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= ogxi_SeriesBCommonStockWarrantsMember
Expiration Date 2019-07
Warrant [Member]  
Class of Warrant or Right [Line Items]  
Total Outstanding and Exercisable 1,587,301us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Exercise price per unit of warrant $ 20.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Expiration Date 2015-10