Short-Term Investments

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Short-Term Investments

3. Short-Term Investments

The following tables summarize the amortized cost and estimated fair value of the Company’s U.S. government treasury securities and marketable securities, which are considered to be available-for-sale investments and are included in short-term investments on the consolidated balance sheets:

	December 31, 2022
(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. government treasury securities	$	99,288	$	1	$	(253	)	$	99,036
Marketable securities:
Corporate and agency bonds		28,748		3		(84	)		28,667
Totals	$	128,036	$	4	$	(337	)	$	127,703
	December 31, 2021
(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. government treasury securities	$	25,092	$	—	$	(20	)	$	25,072
Marketable securities:
Commercial paper		11,568		1		—			11,569
Corporate and agency bonds		9,821		—		(3	)		9,818
Totals	$	46,481	$	1	$	(23	)	$	46,459

Certain short-term debt securities with original maturities of less than three months are included in cash and cash equivalents on the consolidated balance sheets and are not included in the tables above. At December 31, 2022 and 2021, all investments had contractual maturities within one year.