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