Collaboration Revenue (Tables)

12 Months Ended

Dec. 31, 2019

Revenue From Contract With Customer [Abstract]

Changes in Contract Liabilities

The following tables present changes in the Company’s contract liabilities during the twelve months ended December 31, 2019 and 2018:

	Balance as of December 31, 2018		Additions		Deductions			Balance as of December 31, 2019
Year ended December 31, 2019
Contract liabilities:
Deferred revenue - related party		137,259		—		(27,188	)		110,071
Deferred revenue		—		15,883		(6,215	)		9,668

	Balance as of January 1, 2018		Additions		Deductions			Balance as of December 31, 2018
Year ended December 31, 2018
Contract liabilities:
Deferred revenue - related party		123,783		40,393		(26,917	)		137,259

During the twelve months ended December 31, 2019 the Company recognized the following revenues as a result of changes in the contract liability balances in the respective periods:

	Year Ended December 31,
	2019		2018
Revenue recognized in the period from:
Amounts included in the contract liability at the beginning of the period		27,188		15,774