Revenue from Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

Expected Timing of Revenue Recognition

At June 30, 2019, $9.9 million of this revenue remains unrecognized and is expected be recognized through the first half of 2021 as follows (in millions).

Time Period	Amount
Remainder of 2019	4.7
2020	4.3
2021	0.9
Total	9.9

Disaggregation of Revenue

The following table presents revenue (in thousands) for the three and six-month periods ended June 30, 2019 disaggregated by revenue type.

	Three Months Ended June 30, 2019		Six Months Ended June 30, 2019
Revenue Type
License revenue	$	20,979	$	20,979
Collaboration revenue		813		813
	$	21,792	$	21,792

Schedule of Contract with Customer Asset

The following table provides information about contract assets from contracts with customers (in thousands):

Year ended December 31, 2018	Balance at beginning of period		Additions		Deductions			Balance at June 30, 2019
Contract assets:
Unbilled receivables from collaboration partners	$	—	$	13,479	$	(761	)	$	12,718