Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2022

Fair Value Disclosures [Abstract]

Schedule of Estimated Fair Value of Financial Instrument

The estimated fair values of financial instruments outstanding were (in thousands):

	September 30, 2022 (Unaudited)
			Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
Short-term investments	$	18,372	$	—	$	(53	)	$	18,319
Total	$	18,372	$	—	$	(53	)	$	18,319

	December 31, 2021
			Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
Short-term investments	$	23,040	$	—	$	(29	)	$	23,011
Total	$	23,040	$	—	$	(29	)	$	23,011

Schedule of Fair Value Hierarchy Financial Assets

The following table represents the Company’s fair value hierarchy for its financial assets (cash equivalents and investments) (in thousands):

	September 30, 2022 (Unaudited)
	Fair Value		Level 1		Level 2		Level 3
Money market funds	$	2,319	$	2,319	$	—	$	—
Corporate notes and commercial paper		18,319		18,319		—		—
Total financial assets	$	20,638	$	20,638	$	—	$	—

	December 31, 2021
	Fair Value		Level 1		Level 2		Level 3
Money market funds	$	5,484	$	5,484	$	—	$	—
Corporate notes and commercial paper		23,011		23,011		—		—
Total financial assets	$	28,495	$	28,495	$	—	$	—

Schedule of Derivative Liability Transactions

	Three Months Ending						Nine Months Ending
	September 30, 2022			September 30, 2021			September 30, 2022			September 30, 2021
	(Unaudited)			(Unaudited)			(Unaudited)			(Unaudited)
Beginning balance	$	115,000		$	842,000		$	138,000		$	383,000
Issuance of warrants		—			—			—			—
Change in fair value	$	(58,000	)	$	(502,000	)	$	(81,000	)	$	(43,000	)
Extinguishment		—			—			—			—
Ending balance	$	57,000		$	340,000		$	57,000		$	340,000