Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Commitment Payment to Strategic Business Partners

The table below summarizes contingent, potential milestone payments that would become due to strategic partners in the years 2018 and beyond, assuming all such contingencies occur (in thousands):

Year ending December 31,	Milestone Payments
2018	$	11,139
2019	5,545
2020	1,500
2021 and beyond	950
Total	$	19,134