Commitments and Contingencies

3 Months Ended

Mar. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

17. Commitments and Contingencies

Contingent Consideration

As discussed in Note 3, in September 2015, the Company completed the ALF-X Acquisition using a combination of cash, stock and potential post-acquisition milestone payments. These milestone payments may be payable in the future, depending on the achievement of certain regulatory and commercial milestones. The maximum amount of the aggregate milestone payments could be €27.5 million. As of March 31, 2016, the fair value of the contingent consideration was $24.4 million.