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Asset Sales (Details) - USD ($)
1 Months Ended 24 Months Ended
Jun. 30, 2014
Mar. 28, 2012
Jun. 30, 2014
Sep. 30, 2011
Dec. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Deferred Revenue Arrangement [Line Items]              
Cash proceeds due to regulatory   $ 1,000,000          
Milestone reduction limit   $ 500,000          
Royalty revenue term   10 years          
Divestiture of businesses proceeds       $ 6,500,000      
Divestiture of business if milestones unattained         $ 6,000,000 $ 6,000,000 $ 6,000,000
Milestone addition limit         $ 3,000,000    
Asset sales | Hikma Pharmaceuticals, Co. Ltd.              
Deferred Revenue Arrangement [Line Items]              
Deferred revenue $ 3,500,000   $ 3,500,000        
Asset sales excluding Tech Transfers | Par Pharmaceuticals Companies, Inc.              
Deferred Revenue Arrangement [Line Items]              
Deferred revenue, noncurrent       5,500,000      
Initiation of Tech Transfer | Par Pharmaceuticals Companies, Inc.              
Deferred Revenue Arrangement [Line Items]              
Divestiture of businesses proceeds       500,000      
Deferred revenue, noncurrent       250,000      
Completion of Tech Transfer | Par Pharmaceuticals Companies, Inc.              
Deferred Revenue Arrangement [Line Items]              
Divestiture of businesses proceeds       500,000      
Deferred revenue, noncurrent       $ 250,000