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Summary of Significant Accounting Policies - Summary of Percentage of Significant Revenue (Detail) (Sales [Member]) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Servier [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of all significant revenue earned | 51.60% | 17.30% |
Boehringer [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of all significant revenue earned | 24.80% | 18.40% | 15.60%
Gilead [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of all significant revenue earned | 13.80% |  |
Pfizer [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of all significant revenue earned | 6.00% | 8.70% | 10.80%
Government Agencies [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of all significant revenue earned | 2.20% | 6.50% | 17.70%
Eli Lilly [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of all significant revenue earned | 1.40% | 48.90% | 54.00%

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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