Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2022

Fair Value of Financial Instruments

Schedule of cash, cash equivalents, marketable securities and restricted cash

	September 30, 2022
	Adjusted		Unrealized		Unrealized				Cash and Cash		Restricted		Marketable
	Cost		Gains		Losses		Fair Value		Equivalents		Cash		Securities
Cash	$	17,584	$	—	$	—	$	17,584	$	15,027	$	2,557	$	—
Level 1 (1):
Money market funds		3,424		—		—		3,424		3,424		—		—
U.S. treasury securities		21,970		—		(28)		21,942		3,980		—		17,961
Subtotal		25,394		—		(28)		25,366		7,404		—		17,961
Total	$	42,978	$	—	$	(28)	$	42,950	$	22,431	$	2,557	$	17,961

	December 31, 2021
	Adjusted		Unrealized		Unrealized				Cash and Cash		Restricted		Marketable
	Cost		Gains		Losses		Fair Value		Equivalents		Cash		Securities
Cash	$	9,459	$	—	$	—	$	9,459	$	8,148	$	1,311	$	—
Level 1 (1):
Money market funds		58,775		—		—		58,775		58,775		—		—
Subtotal		58,775		—		—		58,775		58,775		—		—
Total	$	68,234	$	—	$	—	$	68,234	$	66,923	$	1,311	$	—

(1) The fair value of Level 1 securities is estimated based on quoted prices in active markets for identical assets or liabilities.