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Intangible Assets - Additional Information (Detail) (USD $) |  |  | 3 Months Ended
--- | --- | --- | ---
Mar. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2014 Ceregene, Inc. [Member]
Finite-Lived Intangible Assets [Line Items] |  |  |
Excess of consideration transferred over the fair values assigned to assets acquired and liabilities assumed | $ 1,585,000 | $ 1,585,000 | $ 1,600,000
Changes in the Goodwill |  |  | $ 0

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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