Revenue (Tables)

3 Months Ended

Mar. 31, 2021

Revenue Recognition [Abstract]

Schedule of Deferred Revenue Activity

The following is a summary of the Company’s deferred revenue activity as of March 31, 2021:

(in thousands)	NIDA Grant		Total
Balance as of December 31, 2020	$	355	$	355
Additions to deferred revenue	1,187		1,187
Recognized as revenue	(683)		(683)
Balance as of March 31, 2021	$	859	$	859