Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2019

Revenue From Contract With Customer [Abstract]

Disaggregated Revenues by Timing of Transfer of Goods or Services

The following table presents our revenues, disaggregated by timing of transfer of goods or services (in thousands):

	Three Months Ended March 31, 2019
	Product Revenue, net		Collaboration and License Revenue		Total
Timing of revenue recognition:
Transferred at a point in time	$	20,362	$	—	$	20,362
Transferred over time		—		1,807		1,807
Total	$	20,362	$	1,807	$	22,169

Schedule of Changes in Contract Assets and Liabilities

The following table presents changes in our contract assets and liabilities for the three months ended March 31, 2019 (in thousands):

	Balance at Beginning of Period		Addition		Deduction			Balance at End of Period
Contract assets:
Unbilled - collaboration and license revenue	$	9,880	$	1,634	$	(5,197	)	$	6,317
Total contract assets	$	9,880	$	1,634	$	(5,197	)	$	6,317
Contract liabilities:
Deferred revenue	$	6,335	$	1,112	$	(809	)	$	6,638
Total contract liabilities	$	6,335	$	1,112	$	(809	)	$	6,638

Significant changes in the contract liabilities balances during the period are as follows (in thousands):

	Three Months Ended as of March 31, 2019
Revenue recognized according to the current period performance that was included in the contract liability at the beginning of the period		173

Estimated Revenue Expected to be Recognized in Future Related to Performance Obligations

The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied or partially unsatisfied as of March 31, 2019 (in thousands):

Collaborator	Transaction Price Allocated to the Remaining Performance Obligation as of March 31, 2019		Expected Year By Which Revenue Recognition Will Be Completed		Percentage of Revenue Recognized
BMS and Pfizer - 2016 agreement	$	1,525		2021		88	%
Daiichi Sankyo - 2014 agreement		1,112		2020		97	%
Daiichi Sankyo - 2016 agreement		3,257		2023		79	%
Bayer - 2016 agreement		2,911		2023		81	%
Total	$	8,805