Annual report pursuant to Section 13 and 15(d)

Collaboration Arrangements - Additional Information (Detail)

v2.4.0.8
Collaboration Arrangements - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Merck KGaA [Member]
Dec. 31, 2012
Merck KGaA [Member]
Dec. 31, 2013
Merck KGaA [Member]
Subsequent Event [Member]
Dec. 31, 2013
Merck KGaA [Member]
Regulatory and Development Milestones [Member]
Dec. 31, 2013
Merck KGaA [Member]
Commercialization Milestones [Member]
Dec. 31, 2013
Eleison Pharmaceuticals, Inc. [Member]
Dec. 31, 2011
Eleison Pharmaceuticals, Inc. [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]                  
Upfront and milestone payments received to date     $ 110.0   $ 12.5        
Potential future milestones           100 340    
Merck KGaA's percentage share of worldwide development expenses     70.00%            
Portion of profits that Company is eligible to participate in United States, depending upon total sales     50.00%            
Revenue recognized by the Company 12.5 5.9              
Collaboration payments achieved and received     42.5 67.5          
Company earned a reimbursement for eligible worldwide development expenses 16.5 13.1              
Percentage of profits from commercialization               50.00%  
Revenue recognized by the Company $ 0 $ 0             $ 0.1