Short-term Investments

3 Months Ended

Mar. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Short-term Investments

4. Short-term Investments

Short-term investments classified as available-for-sale consisted of the following:

	March 31, 2023
(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term investments:
US Treasuries	$	73,491	$	15	$	(78	)	$	73,428
Agency bonds		3,290		1		—			3,291
Commercial paper		105,554		13		(73	)		105,494
Certificates of deposit		36,755		12		(25	)		36,742
Total short-term investments	$	219,090	$	41	$	(176	)	$	218,955
	December 31, 2022
(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term investments:
US Treasuries	$	59,849	$	3	$	(129	)	$	59,723
Agency bonds		6,450		4		(2	)		6,452
Commercial paper		95,831		29		(123	)		95,737
Certificates of deposit		23,034		17		(24	)		23,027
Total short-term investments	$	185,164	$	53	$	(278	)	$	184,939

All short-term investments had stated maturity dates of less than one year.