Investment in ADVENTRX Pharmaceuticals	6 Months Ended
Jun. 30, 2011
Investment in ADVENTRX Pharmaceuticals [Abstract]
Investment in ADVENTRX Pharmaceuticals	4. Investment 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. The Company will be entitled to receive an additional 37,000 shares of common stock of ADVENTRX, which shares are currently held in an escrow account established in connection with the acquisition, except to the extent the shares are applied to satisfy potential indemnification obligations to ADVENTRX. 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. The Company's ADVENTRX shares are “restricted” securities within the meaning of the federal securities laws and are subject to certain transfer and voting restrictions under a Stockholders' Voting and Transfer Restriction Agreement. The 126,000 shares of common stock are marked to market, based on the closing price at June 30, 2011 of $3.01 per share.

4. Investment 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. The Company will be entitled to receive an additional 37,000 shares of common stock of ADVENTRX, which shares are currently held in an escrow account established in connection with the acquisition, except to the extent the shares are applied to satisfy potential indemnification obligations to ADVENTRX. 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. The Company's ADVENTRX shares are “restricted” securities within the meaning of the federal securities laws and are subject to certain transfer and voting restrictions under a Stockholders' Voting and Transfer Restriction Agreement. The 126,000 shares of common stock are marked to market, based on the closing price at June 30, 2011 of $3.01 per share.