Investments in ADVENTRX Pharmaceuticals	12 Months Ended
Investments in ADVENTRX Pharmaceuticals	Dec. 31, 2012
Investments in ADVENTRX Pharmaceuticals [Abstract]
Investments in ADVENTRX Pharmaceuticals	11. Investments in ADVENTRX Pharmaceuticals On April 8, 2011, ADVENTRX Pharmaceuticals completed its acquisition of SynthRx, Inc., in which the Company held a 19.1% interest. As a result of the transaction, the Company received approximately 126,000 shares of common stock of ADVENTRX, which it sold on October 11, 2011 for $112,200, and on June 6, 2012, the Company received an additional 38,196 shares of common stock of ADVENTRX that had been held in an escrow established in connection with the acquisition, which it sold for $17,900. If all of the development milestones under the acquisition agreement were to be achieved, the Company also would be entitled to receive up to 2.9 million additional ADVENTRX shares. At the time of the sale, the Company's interest in SynthRx had a zero carrying value.

The entire disclosure for equity method investments and joint ventures. Equity method investments are investments that give the investor the ability to exercise significant influence over the operating and financial policies of an investee. Joint ventures are entities owned and operated by a small group of businesses as a separate and specific business or project for the mutual benefit of the members of the group.

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