Collaboration Revenue (Tables)

3 Months Ended

Mar. 31, 2021

Revenue From Contract With Customer [Abstract]

Changes in Contract Liabilities

The following table presents changes in the Company’s contract liabilities during the three months ended March 31, 2021 and 2020 (in thousands):

	Balance as of December 31, 2020		Additions		Deductions			Balance as of March 31, 2021
Three Months Ended March 31, 2021
Contract liabilities:
Deferred revenue - related party	$	108,174		—		(4,648	)	$	103,526

	Balance as of December 31, 2019		Additions		Deductions			Balance as of March 31, 2020
Three Months Ended March 31, 2020
Contract liabilities:
Deferred revenue - related party	$	110,071		—		(5,462	)	$	104,609
Deferred revenue	$	9,668		816		(1,988	)	$	8,496

During the three months ended March 31, 2021 and 2020 the Company recognized the following revenues as a result of changes in the contract liability balances in the respective periods (in thousands):

	Three Months Ended March 31,
	2021		2020
Revenue recognized in the period from:
Amounts included in the contract liability at the beginning of the period	$	4,648	$	6,634