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Subsequent Event (Notes)	12 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event The Company earned and recognized a $1 million commercial milestone payment from Onyx Pharmaceuticals (a subsidiary of Amgen, Inc.) in the first quarter of 2014. The milestone payment was triggered by the achievement of over $250 million of annual product sales of Kyprolis in 2013.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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