Annual report pursuant to Section 13 and 15(d)

Subsequent Events Subsequent Events (Details)

Subsequent Events Subsequent Events (Details) (Pfizer Inc., Collaborative Arrangement, Product, Subsequent Event, USD $)
In Millions, unless otherwise specified
Jan. 31, 2015
Pfizer Inc. | Collaborative Arrangement, Product | Subsequent Event
Subsequent Event [Line Items]  
Expected payment of OCS $ 25.6opk_CollaborativeArrangementObligationPayable
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