Annual report pursuant to Section 13 and 15(d)

Common Stock - Summary of Stock Options Outstanding Regarding Number of Common Shares Issuable upon Exercise of Vested Options (Detail)

v2.4.1.9
Common Stock - Summary of Stock Options Outstanding Regarding Number of Common Shares Issuable upon Exercise of Vested Options (Detail) (USD $)
 12 Months Ended
Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Number of Vested Options 851,612us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
Exercise Price Range, Weighted Average Vested Price $ 11.12us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
Exercise Price Range, Weighted Average Remaining Contractual Term 4 years 11 months 12 days
Range one [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Number of Vested Options 35,856us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeOneMember
Exercise Price Range, Weighted Average Vested Price $ 2.68us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeOneMember
Exercise Price Range, Weighted Average Remaining Contractual Term 1 year 3 months 15 days
Exercise Price Range, Lower Range Limit $ 2.11us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeOneMember
Exercise Price Range, Upper Range Limit $ 2.85us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeOneMember
Range two [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Number of Vested Options 219,125us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTwoMember
Exercise Price Range, Weighted Average Vested Price $ 3.00us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTwoMember
Exercise Price Range, Weighted Average Remaining Contractual Term 1 year
Exercise Price Range, Lower Range Limit $ 2.86us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTwoMember
Exercise Price Range, Upper Range Limit $ 3.09us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTwoMember
Range three [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Number of Vested Options 32,452us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeThreeMember
Exercise Price Range, Weighted Average Vested Price $ 6.83us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeThreeMember
Exercise Price Range, Weighted Average Remaining Contractual Term 4 years 3 months
Exercise Price Range, Lower Range Limit $ 3.10us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeThreeMember
Exercise Price Range, Upper Range Limit $ 10.27us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeThreeMember
Range four [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Number of Vested Options 29,750us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeFourMember
Exercise Price Range, Weighted Average Vested Price $ 10.87us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeFourMember
Exercise Price Range, Weighted Average Remaining Contractual Term 8 years 1 month 24 days
Exercise Price Range, Lower Range Limit $ 10.28us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeFourMember
Exercise Price Range, Upper Range Limit $ 11.70us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeFourMember
Range five [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Number of Vested Options 51,873us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeFiveMember
Exercise Price Range, Weighted Average Vested Price $ 11.79us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeFiveMember
Exercise Price Range, Weighted Average Remaining Contractual Term 9 years 2 months 12 days
Exercise Price Range, Lower Range Limit $ 11.71us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeFiveMember
Exercise Price Range, Upper Range Limit $ 11.84us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeFiveMember
Range six [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Number of Vested Options 81,266us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeSixMember
Exercise Price Range, Weighted Average Vested Price $ 11.95us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeSixMember
Exercise Price Range, Weighted Average Remaining Contractual Term 8 years 1 month 10 days
Exercise Price Range, Lower Range Limit $ 11.85us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeSixMember
Exercise Price Range, Upper Range Limit $ 11.99us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeSixMember
Range seven [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Number of Vested Options 110,840us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeSevenMember
Exercise Price Range, Weighted Average Vested Price $ 12.84us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeSevenMember
Exercise Price Range, Weighted Average Remaining Contractual Term 7 years 2 months 27 days
Exercise Price Range, Lower Range Limit $ 12.00us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeSevenMember
Exercise Price Range, Upper Range Limit $ 13.06us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeSevenMember
Range eight [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Number of Vested Options 33,870us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeEightMember
Exercise Price Range, Weighted Average Vested Price $ 14.41us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeEightMember
Exercise Price Range, Weighted Average Remaining Contractual Term 6 years 2 months 12 days
Exercise Price Range, Lower Range Limit $ 13.07us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeEightMember
Exercise Price Range, Upper Range Limit $ 15.74us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeEightMember
Range nine [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Number of Vested Options 119,750us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeNineMember
Exercise Price Range, Weighted Average Vested Price $ 15.97us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeNineMember
Exercise Price Range, Weighted Average Remaining Contractual Term 5 years 11 months 12 days
Exercise Price Range, Lower Range Limit $ 15.75us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeNineMember
Exercise Price Range, Upper Range Limit $ 16.40us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeNineMember
Range ten [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price Range, Number of Vested Options 136,830us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTenMember
Exercise Price Range, Weighted Average Vested Price $ 20.21us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTenMember
Exercise Price Range, Weighted Average Remaining Contractual Term 5 years 2 months 16 days
Exercise Price Range, Lower Range Limit $ 16.41us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTenMember
Exercise Price Range, Upper Range Limit $ 22.28us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
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= ogxi_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTenMember