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Collaboration and Licensing Agreements - Schedule of Changes in Deferred Revenue (Details) - 2019 KKC Agreement $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Balance at December 31, 2019	$ 4,541
Decreases due to revenue recognized in the period for which cash has been received	(1,828)
Decreases due to revenue recognized in the period for which cash has not been received	(1,828)
Balance at September 30, 2020	$ 885

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer is due.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
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