Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2022

Investments All Other Investments [Abstract]

Cash Equivalents and Short-Term Investments Classified as Available-for-sale Securities

Cash equivalents and short-term investments (debt securities) which are classified as available-for-sale securities, consisted of the following (in thousands):

September 30, 2022	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Money market funds (cash equivalents)	$	23,090	$	—	$	—	$	23,090
Total financial assets	$	23,090	$	—	$	—	$	23,090
Classified as:
Cash and cash equivalents							$	23,090
Total financial assets							$	23,090

December 31, 2021	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Money market funds (cash equivalents)	$	44,347	$	—	$	—	$	44,347
U.S. government agency securities		2,504		—		—		2,504
Total financial assets	$	46,851	$	—	$	—	$	46,851
Classified as:
Cash and cash equivalents							$	44,347
Short-term investments								2,504
Total financial assets							$	46,851