Investments in ADVENTRX Pharmaceuticals (Details) (USD $)	Dec. 31, 2014	Jun. 06, 2012	Oct. 11, 2011	Apr. 08, 2011
SynthRx, Inc. [Member]
Schedule of Equity Method Investment [Line Items]
Equity investment, ownership percentage (in hundredths)				19.10%
ADVENTRX Pharmaceuticals [Member]
Schedule of Equity Method Investment [Line Items]
Common stock received in acquiring company upon acquisition of equity method investee (in shares)				126,000
Proceeds from sale of common stock in acquiring entity		$ 17,900	$ 112,200
Additional shares of common stock held in an escrow potentially issuable (in shares)		38,196
Additional shares of common stock potentially issuable from development milestones, maximum (in shares)	2,900,000