Deferred Revenue (Tables)

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Schedule of Deferred Revenue

Current and long-term deferred revenue are detailed in the following table:

Deferred Revenue (in thousands)	NIH Grant			BED		Total
Current portion		$	918	$	—	$	918
Long-term portion		—		—		—
Total		$	918	$	—	$	918

The following is a summary of the Company’s deferred revenue activity for the year ended December 31, 2019 and 2018:

(in thousands)	NIH Grant				BED			Total
Balance as of December 31, 2017		$	—		$	895		$	2,495
Cash Received NIH		1,000			—			1,000
Converted to Equity		—			—			(1,600		)
Recognized as revenue		(432		)	(251		)	(683		)
Balance as of December 31, 2018		$	568		$	644		$	1,212
Cash Received NIH		2,400			—			2,400
Recognized as revenue		(2,050		)	(644		)	(2,694		)
Balance as of December 31, 2019		$	918		$	—		$	918