Revenue (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Schedule of Deferred Revenue

The following is a summary of the Company’s deferred revenue activity for the years ended December 31, 2021 and 2020:

(in thousands)	NIH Grant
Balance as of December 31, 2019		$	918
Cash Received from NIH		1,000
Recognized as revenue		(1,563)
Balance as of December 31, 2020		$	355
Cash Received from NIH		2,988
Recognized as revenue		(3,326)
Balance as of December 31, 2021		$	17