Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

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 2019 and beyond, assuming all such contingencies occur (in thousands):

Year ending December 31,	Milestone Payments
2019	$	4,658
2020	3,890
2021	2,650
2022 and beyond	1,800
Total	$	12,998