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Network
100480 - Disclosure - Income Tax - Reconciliation of Unrecognized Tax Benefits of Uncertain Tax Positions (Detail)
(http://oncogenex.com/20161231/taxonomy/role/DisclosureIncomeTaxReconciliationOfUnrecognizedTaxBenefitsOfUncertainTaxPositionsDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000949858 (http://www.sec.gov/CIK)
Income Tax Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Income Tax Disclosure [Abstract]
 
 
 
Unrecognized tax benefits, Beginning Balance
2,055,000  
2,039,000  
2,007,000  
Additions based on tax positions related to the current year
16,000  
16,000  
32,000  
Additions based on tax positions related to prior years
   
Unrecognized tax benefits, Ending Balance
2,071,000  
 
2,055,000  
 
2,039,000