Investments

9 Months Ended

Sep. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Investments

4. Investments

As of September 30, 2022 and December 31, 2021, the fair value of available-for-sale investments by type of security was as follows:

	September 30, 2022
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Investments:
Commercial paper	$	14,738	$	—	$	(55	)	$	14,683
Corporate notes		1,252		—		(4	)		1,248
Treasury Bills		4,746		—		(39	)		4,707
Total Investments as of September 30, 2022	$	20,736	$	—	$	(98	)	$	20,638

	December 31, 2021
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Investments:
Commercial paper	$	33,976	$	—	$	(7	)	$	33,969
Corporate notes		6,368		—		(2	)		6,366
Treasury bills		2,002		—		(4	)		1,998
Total Investments as of December 31, 2021	$	42,346	$	—	$	(13	)	$	42,333