Subsequent Event

12 Months Ended

Dec. 31, 2015

Subsequent Events [Abstract]

Subsequent Event

12. Subsequent Event

In January 2016, in connection with the Company’s Collaboration Agreement which was signed with Mitsubishi Tanabe in December 2015, the Company received a $40.0 million up-front payment.  The $40.0 million up-front payment was contingent upon the Company providing certain tax documentation to Mitsubishi which was completed in January 2016. The Company therefore did not have a contractual right to bill until the tax documents were provided in January 2016. Of the $40.0 million received, $20.0 million is subject to refund to Mitsubishi depending on the outcome of discussions with the Japanese regulator about the global trial design.