Collaboration and License Agreements (Tables)

9 Months Ended

Sep. 30, 2019

Revenue Recognition and Deferred Revenue [Abstract]

Schedule of Collaboration Revenue

During the three and nine months ended September 30, 2019 and 2018, we recognized the following collaboration revenue (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Services performed that were considered performance obligations as of the modification dates
Licenses	$	—	$	—	$	—	$	15,000
On-going research and development services	4,695		7,504		29,915		23,698
Services performed that were not considered performance obligations as of the modification dates
Development activities	—		312		—		902
Commercialization activities	821		916		2,499		2,878
Total collaboration revenue - related party	$	5,516	$	8,732	$	32,414	$	42,478

Schedule of Changes in Contract Assets and Liabilities

The following table presents changes in our contract assets and liabilities during the nine months ended September 30, 2019 (in thousands):

	December 31, 2018		Additions		Deductions		September 30, 2019
Contract assets (1)
Collaboration receivable – related party	$	2,462	$	6,568	$	(7,192)	$	1,838
Royalty receivable – related party	2,234		7,569		(7,203)		2,600
Contract liabilities (2)
Deferred revenue – related party, current and net of current portions	92,519		5,000		(30,849)		66,670

(1) Additions to contract assets relate to amounts billed to Celgene during the reporting period. Deductions to contract assets relate to collection of receivables during the reporting period.

(2) Additions to contract liabilities relate to consideration from Celgene during the reporting period. Deductions to contract liabilities relate to deferred revenue recognized as revenue during the reporting period.

During the three and nine months ended September 30, 2019 and 2018, we recognized the following as revenue due to changes in the contract liability balances (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Amounts included in the contract liability at the beginning of the period	$	4,404	$	7,555	$	28,823	$	23,472
Performance obligations satisfied in previous periods	—		219		—		762

Schedule of Royalty Revenue

During the three and nine months ended September 30, 2019 and 2018, we recognized the following as royalty revenue (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Royalty revenue – related party	$	2,666	$	2,001	$	7,569	$	4,991

Schedule of Collaboration Revenue Under CStone Agreement

During the three and nine months ended September 30, 2019 and 2018, we recognized the following collaboration revenue -other (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Services performed that were considered performance obligations as of the inception date
License and other services	$	(103)	$	—	$	(103)	$	12,440
Services performed that were not considered performance obligations as of the inception date
Other Services	523		—		2,305		—
Total collaboration revenue - other	$	420	$	—	$	2,202	$	12,440

Schedule of Changes in Contract Assets and Liabilities, CStone Agreement

The following table presents changes in our contract assets during the nine months ended September 30, 2019 (in thousands):

	December 31, 2018		Additions		Deductions		September 30, 2019
Contract assets (1)
Collaboration receivable - other	$	670	$	2,651	$	(2,452)	$	869

(1) Additions to contract assets relate to amounts receivable from CStone. Deductions to contract assets relate to collection of receivables during the reporting period.