Celgene Collaboration Agreement (Tables)

12 Months Ended

Dec. 31, 2018

Research and Development [Abstract]

Contract with Customer, Asset and Liability

The following table presents changes in the Company’s contract liabilities during the year ended December 31, 2018 (in thousands):

	Balance as of							Balance as of
	January 1, 2018		Additions		Reductions			December 31, 2018
Contract liabilities:
Deferred revenue	$	163,073	$	—	$	(65,201	)	$	97,872
Totals	$	163,073	$	—	$	(65,201	)	$	97,872