Long-Term Investments	12 Months Ended
Long-Term Investments	Dec. 31, 2011
Long-Term Investments [Abstract]
Long-Term Investments	Note 9. Long-Term Investments At December 31, 2009, the Company held a 13% equity interest in the voting securities of BioOne, which was accounted for under the cost method. At December 31, 2009, the Company evaluated several criteria to determine whether facts and circumstances supported the carrying value of its investment in BioOne. These criteria included, but were not limited to, third-party investor interest and participation in recent equity offerings at current pricing, business outlook of BioOne and available financial information. Based on its evaluation of these criteria, the Company determined that there were no factors to support any carrying value of its investment in BioOne. As a result, during the year ended December 31, 2009, the Company completely impaired its investment in BioOne to zero and as such, recorded an impairment charge of $2.3 million as a component in "Acquisition related costs and impairment of long-term investments in related parties, net" on the consolidated statements of operations. In connection with the BioOne acquisition in August 2010, the Company relinquished all BioOne shares that the Company held as part of the consideration for certain of these assets and recognized a gain of $0.3 million during the year ended December 31, 2010, which represented the difference between the assumed fair value of the pre-acquisition non-controlling equity interest of BioOne and the carrying value. The Company also incurred acquisition related costs of $0.5 million during the year ended December 31, 2010. See Note 3 in the Notes to Consolidated Financial Statements for further information regarding the Company's acquisition and valuation of BioOne. During the year ended December 31, 2009, the Company also recognized a gain of $0.8 million, which represented the difference between the cash received and the carrying value of its non-controlling equity interest in Anza Therapeutics, Inc. ("Anza Therapeutics"), as the Company relinquished its shares in Anza Therapeutics, released any claims against them and agreed to the transfer of all of Anza Therapeutics' intellectual property to Aduro BioTech ("Aduro") in 2009. In addition, in connection with the agreements to license the immunotherapy technologies to Aduro in 2009, the Company received and held preferred shares representing less than 10% of Aduro's capital. Pursuant to these license agreements, the Company will obtain a 1% royalty fee on any future sales resulting from certain technology. In April 2011, Aduro completed a subsequent round of financing, issuing Series B preferred stock and as a result, reduced its ownership in Aduro to less than 3%. Since receiving preferred stock in Aduro, the Company has carried its investment in Aduro at zero on its consolidated balance sheet as the Company has no basis to believe that it will receive any economic benefit from its equity ownership in Aduro as the Company believed that Aduro's technology platforms, which were largely based on the in-process development programs of Anza Therapeutics, had a high risk of failure.

The entire disclosure for investments accounted for under the cost-method. The carrying amount of such investments may be adjusted, for example, distributions in excess of cost (return of capital) or for other-than-temporary impairments. The cost method and lower-of-cost or market, an adaptation of the cost method, is generally followed for most investments in noncontrolled corporations, in some corporate joint ventures, and to a lesser extent in unconsolidated subsidiaries in which the entity does not have the ability to exercise significant influence.

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