Condensed Consolidated Statements of Operations (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Revenue:
Product revenue, net	$ 189,158us-gaap_SalesRevenueGoodsNet	$ 56,179us-gaap_SalesRevenueGoodsNet
Alliance revenue, net	12,525	0
Collaboration services and other revenue	4,089	3,198
License and milestone revenue	0pcyc_LicenseAndMilestoneRevenue	60,000pcyc_LicenseAndMilestoneRevenue
Total revenue	205,772us-gaap_Revenues	119,377us-gaap_Revenues
Costs and expenses:
Cost of goods sold	16,702us-gaap_CostOfGoodsSold	6,110us-gaap_CostOfGoodsSold
Research and Development Expense	49,377us-gaap_ResearchAndDevelopmentExpense	35,292us-gaap_ResearchAndDevelopmentExpense
Selling, general and administrative	49,505	34,715
Costs of collaboration (see Note 3)	86,228pcyc_CollaborationCosts	25,035pcyc_CollaborationCosts
Amortization of intangible assets (see Note 7)	179us-gaap_AmortizationOfIntangibleAssets	0us-gaap_AmortizationOfIntangibleAssets
Total costs and expenses	201,991us-gaap_CostsAndExpenses	101,152us-gaap_CostsAndExpenses
Income from operations	3,781us-gaap_OperatingIncomeLoss	18,225us-gaap_OperatingIncomeLoss
Interest income	167us-gaap_InterestAndOtherIncome	80us-gaap_InterestAndOtherIncome
Other income (expense), net	285us-gaap_OtherNonoperatingIncomeExpense	(42)us-gaap_OtherNonoperatingIncomeExpense
Income before income taxes	4,233	18,263
Income tax provision (benefit)	86us-gaap_IncomeTaxExpenseBenefit	(12)us-gaap_IncomeTaxExpenseBenefit
Net income	$ 4,147us-gaap_NetIncomeLoss	$ 18,275us-gaap_NetIncomeLoss
Net income per share:
Basic (in dollars per share)	$ 0.05us-gaap_EarningsPerShareBasic	$ 0.24us-gaap_EarningsPerShareBasic
Diluted (in dollars per share)	$ 0.05us-gaap_EarningsPerShareDiluted	$ 0.23us-gaap_EarningsPerShareDiluted
Weighted average shares used to compute net income per share:
Basic (in shares)	76,205	74,754
Diluted (in shares)	79,231	78,064

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