Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of Estimated Fair Value of Financial Instrument

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

	December 31, 2021
			Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
Cash and cash equivalents	$	8,968	$	—	$	—		$	8,968
Short-term investments		23,040		—		(29	)		23,011
	$	32,008	$	—	$	(29	)	$	31,979

	December 31, 2020
			Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
Cash and cash equivalents	$	5,297	$	—	$	—	$	5,297
Short-term investments		—		—		—		—
	$	5,297	$	—	$	—	$	5,297

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):

	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		—
	$	28,495	$	5,484	$	23,011	$	—