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Business Acquisition (Details 4) - Merck Sharpe & Dohme's API - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Business Acquisition    
Net revenues $ 251,519 $ 212,745
Net loss $ (2,787) $ (11,928)
Diluted net loss per share (in Dollars per share) $ (0.06) $ (0.28)