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Summary of Significant Accounting Policies - Summary of Significant Accounts Receivable (Detail) (Accounts Receivable [Member]) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012
Gilead [Member] |  |
Concentration Risk [Line Items] |  |
Significant Accounts Receivable | 53.40% |
Pfizer [Member] |  |
Concentration Risk [Line Items] |  |
Significant Accounts Receivable | 12.30% | 45.40%
Boehringer [Member] |  |
Concentration Risk [Line Items] |  |
Significant Accounts Receivable | 12.20% | 18.00%
Eli Lilly [Member] |  |
Concentration Risk [Line Items] |  |
Significant Accounts Receivable | 7.00% | 28.20%
Servier [Member] |  |
Concentration Risk [Line Items] |  |
Significant Accounts Receivable | 6.40% |
Government Agencies [Member] |  |
Concentration Risk [Line Items] |  |
Significant Accounts Receivable | 4.60% | 8.40%

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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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