Collaboration and Licensing Agreements (Tables)

6 Months Ended

Jun. 30, 2020

Collaboration and Licensing Agreements

Schedule of Changes in Deferred Revenue

	Deferred revenue
Balance at December 31, 2019	$	4,541
Increases due to cash received, excluding amounts recognized as revenue during the period		—
Decreases due to revenue recognized in the period for which cash has been received		(1,150)
Decreases due to revenue recognized in the period for which cash has not been received		(1,150)
Balance at June 30, 2020	$	2,241