Quarterly report pursuant to Section 13 or 15(d)

Excess Lease Liability - Summary of Excess Lease Facility Liability (Detail)

v2.4.1.9
Excess Lease Liability - Summary of Excess Lease Facility Liability (Detail) (Excess lease facility [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Excess lease facility [Member]
   
Operating Leased Assets [Line Items]    
Current portion of excess lease facility, Liability   $ 194us-gaap_RestructuringReserveCurrent
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_FacilityClosingMember
Liability, Total   194us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_FacilityClosingMember
Current portion of excess lease facility, Amortization of excess lease facility (194)ogxi_AmortizationOfExcessLeaseFacilityCurrentPortion
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_FacilityClosingMember
 
Amortization of excess lease facility $ (194)ogxi_AmortizationOfExcessLeaseFacility
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_FacilityClosingMember