Deferred Revenue (Tables)

9 Months Ended

Sep. 30, 2019

Revenue from Contract with Customer [Abstract]

Schedule of Deferred Revenue Activity

The following is a summary of the Company’s deferred revenue activity as of September 30, 2019:

(in thousands)	BED				Grants			Total
Balance as of December 31, 2018		$	644		$	568		$	1,212
Additions to deferred revenue		—			2,400			2,400
Recognized as revenue		(644		)	(1,613		)	(2,257		)
Balance as of September 30, 2019		$	—		$	1,355		$	1,355