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Collaboration and Other Agreements - License agreement with Novo Nordisk A/S, Narrative (Details) (Collaboration and License Agreement with Novo Nordisk [Member], USD $)
 1 Months Ended
Oct. 31, 2012
Collaboration and License Agreement with Novo Nordisk [Member]
  
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]  
Non-Refundable Upfront Payment Upon Execution $ 5,000,000pcyc_NonRefundableUpfrontPaymentUponExecution
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= pcyc_CollaborationandLicenseAgreementwithNovoNordiskMember
Maximum milestone payments $ 55,000,000pcyc_MaximumMilestonePayments
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= pcyc_CollaborationandLicenseAgreementwithNovoNordiskMember