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Fair Value Measurements - Summary of Cash and Cash Equivalents and Short Term Investments (Detail) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
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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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| Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] | ||||
| Cash, amortized cost and estimated fair value | $ 16,481us-gaap_Cash | $ 10,575us-gaap_Cash | ||
| Cash and cash equivalents, amortized cost and estimated fair value | 27,897us-gaap_CashAndCashEquivalentsAtCarryingValue | 14,593us-gaap_CashAndCashEquivalentsAtCarryingValue | 18,075us-gaap_CashAndCashEquivalentsAtCarryingValue | 28,517us-gaap_CashAndCashEquivalentsAtCarryingValue |
| Restricted cash, amortized cost and estimated fair value | 251us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue | |||
| Amortized Cost | 19,179us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis | 24,627us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis | ||
| Gross Unrealized Gains | 1us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax | 3us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax | ||
| Gross Unrealized Losses | (20)us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax | (1)us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax | ||
| Estimated Fair Value | 19,160us-gaap_AvailableForSaleSecuritiesDebtSecurities | 24,629us-gaap_AvailableForSaleSecuritiesDebtSecurities | ||
| Restricted cash, amortized cost and estimated fair value | 314us-gaap_RestrictedCashAndCashEquivalentsNoncurrent | |||
| Money market securities [Member] | ||||
| Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] | ||||
| Cash equivalents, amortized cost and estimated fair value |
11,416us-gaap_CashEquivalentsAtCarryingValue / us-gaap_FairValueByAssetClassAxis = us-gaap_MoneyMarketFundsMember |
4,018us-gaap_CashEquivalentsAtCarryingValue / us-gaap_FairValueByAssetClassAxis = us-gaap_MoneyMarketFundsMember |
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| Restricted cash, amortized cost and estimated fair value |
251us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue / us-gaap_FairValueByAssetClassAxis = us-gaap_MoneyMarketFundsMember |
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| Restricted cash, amortized cost and estimated fair value |
314us-gaap_RestrictedCashAndCashEquivalentsNoncurrent / us-gaap_FairValueByAssetClassAxis = us-gaap_MoneyMarketFundsMember |
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| Corporate bonds and commercial paper [Member] | ||||
| Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] | ||||
| Amortized Cost |
19,179us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_FairValueByAssetClassAxis = ogxi_CorporateBondsAndCommercialPaperShortTermMember |
24,627us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis / us-gaap_FairValueByAssetClassAxis = ogxi_CorporateBondsAndCommercialPaperShortTermMember |
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| Gross Unrealized Gains |
1us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByAssetClassAxis = ogxi_CorporateBondsAndCommercialPaperShortTermMember |
3us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_FairValueByAssetClassAxis = ogxi_CorporateBondsAndCommercialPaperShortTermMember |
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| Gross Unrealized Losses |
(20)us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByAssetClassAxis = ogxi_CorporateBondsAndCommercialPaperShortTermMember |
(1)us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_FairValueByAssetClassAxis = ogxi_CorporateBondsAndCommercialPaperShortTermMember |
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| Estimated Fair Value |
$ 19,160us-gaap_AvailableForSaleSecuritiesDebtSecurities / us-gaap_FairValueByAssetClassAxis = ogxi_CorporateBondsAndCommercialPaperShortTermMember |
$ 24,629us-gaap_AvailableForSaleSecuritiesDebtSecurities / us-gaap_FairValueByAssetClassAxis = ogxi_CorporateBondsAndCommercialPaperShortTermMember |
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- Definition
Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of debt securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Cash and equivalents whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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