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Common Stock - Additional Information 1 (Detail) (USD $)
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12 Months Ended |
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Dec. 31, 2014
Right
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Oct. 22, 2010
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Weighted average fair value of stock options granted |
$ 6.52us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
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$ 8.07us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
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$ 9.86us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
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| Unrecognized compensation expense related to stock options granted |
$ 2,700,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
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| Estimated grant date fair value of stock options vested |
1,900,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
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1,800,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
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1,600,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
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| Aggregate intrinsic value of options exercised |
51,100us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
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34,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
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1,200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
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| Aggregate intrinsic value of the outstanding options |
4,680us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
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| Aggregate intrinsic value of the exercisable outstanding options |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue
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| Exercise price per unit of warrant |
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$ 20us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
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| Common shares purchased, value |
2,860,000us-gaap_StockIssuedDuringPeriodValueNewIssues
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| Number Of Warrants Exercised |
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0ogxi_NumberOfWarrantsExercised
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| Reverse stock split |
One-for-eighteen reverse stock split
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| Percentage of acquisition of company's common stock |
15.00%ogxi_ShareholderRightsPlanToAcquireAdditionalSharesOfCommonStock
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| Number of rights per share of common stock |
18ogxi_NumberOfRightsAssociatedWithPerShareOfCommonStock
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| Effect on diluted per share on options, restricted stock units and warrants |
7,000,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
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3,000,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
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2,600,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
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| Series A preferred stock [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Exercise price per Share |
$ 140us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
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| Shareholder rights plan description |
One one-hundredth
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| Series A Warrants [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Exercise price per unit of warrant |
$ 4.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= ogxi_SeriesAWarrantMember
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| Number Of Warrants Exercised |
0ogxi_NumberOfWarrantsExercised
/ us-gaap_ClassOfWarrantOrRightAxis
= ogxi_SeriesAWarrantMember
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| Series B Warrants [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Exercise price per unit of warrant |
$ 4.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= ogxi_SeriesBWarrantMember
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| Number Of Warrants Exercised |
0ogxi_NumberOfWarrantsExercised
/ us-gaap_ClassOfWarrantOrRightAxis
= ogxi_SeriesBWarrantMember
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| Pre-Funded Series B Warrants [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Exercise price per unit of warrant |
$ 0.01us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_StatementEquityComponentsAxis
= ogxi_PreFundedWarrantMember
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| Common shares purchased |
1,340,538us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= ogxi_PreFundedWarrantMember
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| Common shares purchased, value |
13,405us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= ogxi_PreFundedWarrantMember
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| Warrant [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Exercise price per unit of warrant |
$ 20.00us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
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| Number Of Warrants Exercised |
0ogxi_NumberOfWarrantsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
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| Stock options [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Weighted-average period, restricted stock awards |
2 years 6 months
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| Stock options [Member] | Minimum [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Award expiration period |
7 years
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| Stock options [Member] | Maximum |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Award expiration period |
10 years
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| Stock options [Member] | Employees and consultants [Member] | Minimum [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Award vesting period |
3 years
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| Stock options [Member] | Employees and consultants [Member] | Maximum |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Award vesting period |
4 years
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| Stock options [Member] | Board of Directors [Member] | Minimum [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Award vesting period |
1 year
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| Stock options [Member] | Board of Directors [Member] | Maximum |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Award vesting period |
3 years
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| Restricted stock unit awards [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Award vesting period |
4 years
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| Weighted-average period, restricted stock awards |
2 years 9 months 18 days
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| Stock based compensation expense |
2,200,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
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1,100,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
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600,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
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| Total unrecognized compensation expense related to the Company's restricted stock unit awards |
$ 3,500,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
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