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Stockholders' Equity - Additional Information (Detail) (USD $)
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12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2010
Baxter SA [Member]
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Dec. 31, 2013
Baxter SA [Member]
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Dec. 31, 2012
Baxter SA [Member]
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Dec. 31, 2011
SynBio [Member]
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Dec. 31, 2013
SynBio [Member]
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Dec. 31, 2012
SynBio [Member]
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Dec. 31, 2012
Serum Institute [Member]
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Dec. 31, 2011
Serum Institute [Member]
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Dec. 31, 2013
Serum Institute [Member]
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Dec. 31, 2011
Serum Institute [Member]
Minimum [Member]
Tranches
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Dec. 31, 2011
Serum Institute [Member]
Minimum [Member]
Tranches One [Member]
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Dec. 31, 2011
Serum Institute [Member]
Minimum [Member]
Tranches Two [Member]
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Dec. 31, 2011
Serum Institute [Member]
Minimum [Member]
Tranches Three [Member]
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Dec. 31, 2011
Serum Institute [Member]
Maximum [Member]
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| Schedule Of Stockholders Equity [Line Items] | ||||||||||||||
| Warrants granted to purchase common stock | 4,588,298 | 3,545,600 | 2,400,000 | |||||||||||
| Warrants expiration date | Jun. 30, 2015 | Dec. 02, 2016 | Dec. 31, 2012 | |||||||||||
| Warrants outstanding | $ 932,000 | $ 932,000 | $ 108,000 | $ 108,000 | $ 10,000 | |||||||||
| Warrants exercise holding period | 2 years | |||||||||||||
| Warrants expired during the period | 800,000 | |||||||||||||
| Warrants expiration period | 6 months | 18 months | ||||||||||||
| Warrants granted to purchase common stock, shares | 1,600,000 | |||||||||||||
| Number of tranches | 3 | |||||||||||||
| Warrants issued | 0 | 0 | 800,000 | 800,000 | 800,000 | |||||||||