Marketable securities (Tables)

3 Months Ended

Mar. 31, 2023

Marketable Securities [Abstract]

Summary of marketable securities

Marketable securities as of March 31, 2023 consisted of the following (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Marketable securities, current:
Corporate debt securities	$	166,148	$	5	$	(1,280)	$	164,873
U.S. government debt securities	43,993		—		(872)		43,121
U.S. Treasury securities	12,937		4		(86)		12,855
Marketable securities, non-current:
Corporate debt securities	29,947		2		(203)		29,746
U.S. government debt securities	5,000		—		(40)		4,960
Total marketable securities, current and non-current	$	258,025	$	11	$	(2,481)	$	255,555

Marketable securities as of December 31, 2022 consisted of the following (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Marketable securities, current:
Corporate debt securities	$	183,270	$	2	$	(2,068)	$	181,204
U.S. government debt securities	40,986		—		(1,184)		39,802
U.S. Treasury securities	25,650		—		(257)		25,393
Marketable securities, non-current:
Corporate debt securities	53,592		2		(471)		53,123
U.S. government debt securities	8,000		—		(161)		7,839
Total marketable securities, current and non-current	$	311,498	$	4	$	(4,141)	$	307,361

Summary of marketable securities in unrealized loss position

Marketable securities in unrealized loss positions as of March 31, 2023 consisted of the following (in thousands, except number of securities):

	Number of Securities	Fair Value		Gross Unrealized Losses
Marketable securities in continuous unrealized loss position for less than 12 months:
Corporate debt securities	50	$	109,002	$	(573)
U.S. government debt securities	3	6,949		(50)
Marketable securities in continuous unrealized loss position for greater than 12 months:
Corporate debt securities	37	74,460		(910)
U.S. government debt securities	10	41,132		(862)
U.S. Treasury securities	3	9,949		$	(86)
Total marketable securities in unrealized loss position	103	$	241,492	$	(2,481)

Marketable securities in unrealized loss positions as of December 31, 2022, consisted of the following (in thousands, except number of securities):

	Number of Securities	Fair Value		Gross Unrealized Losses
Marketable securities in continuous unrealized loss position for less than 12 months:
Corporate debt securities	63	$	134,027	$	(1,262)
U.S. government debt securities	6	15,748		(245)
U.S. Treasury securities	4	5,575		(11)
Marketable securities in continuous unrealized loss position for greater than 12 months:
Corporate debt securities	36	82,375		(1,277)
U.S. government debt securities	7	31,892		(1,100)
U.S. Treasury securities	4	19,817		(246)
Total marketable securities in unrealized loss position	120	$	289,434	$	(4,141)