Collaboration Revenue (Tables)

9 Months Ended

Sep. 30, 2020

Revenue From Contract With Customer [Abstract]

Changes in Contract Liabilities

The following table presents changes in the Company’s contract liabilities during the nine months ended September 30, 2020 and 2019 (in thousands):

	Balance as of December 31, 2019		Additions		Deductions			Balance as of September 30, 2020
Nine months ended September 30, 2020
Contract liabilities:
Deferred revenue - related party	$	110,071		—		(10,728	)	$	99,343
Deferred revenue	$	9,668		827		(2,016	)	$	8,479

	Balance as of December 31, 2018		Additions		Deductions			Balance as of September 30, 2019
Nine months ended September 30, 2019
Contract liabilities:
Deferred revenue - related party	$	137,259		—		(21,909	)	$	115,350
Deferred revenue	$	—		8,383		(4,183	)	$	4,200

During the three and nine months ended September 30, 2020 and 2019 the Company recognized the following revenues as a result of changes in the contract liabilities balances in the respective periods (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Revenue recognized in the period from:
Amounts included in the contract liability at the beginning of the period	$	—	$	6,081	$	11,837	$	21,909