Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2023

Investments, Debt and Equity Securities [Abstract]

Schedule of amortized cost, gross unrealized holding gains, gross unrealized holding losses, and fair value for available-for-sale securities by major security type and class of security

	Amortized cost		Gross unrealized holding gains		Gross unrealized holding losses			Estimated fair value
September 30, 2023
Available-for-sale securities:
US Treasury securities	$	3,281	$	—	$	(3	)	$	3,278
Mutual funds		1,169		2		—			1,171
Certificates of deposit		859		—		—			859
Corporate bonds and notes	$	989	$	—	$	(16	)	$	973
Total available-for-sale securities	$	6,298	$	2	$	(19	)	$	6,281

Schedule of maturities of marketable securities classified as available-for-sale securities

	Amortized cost		Estimated fair value
Due within one year	$	5,715	$	5,698
Due after one year through five years		583		583
Due after five years		—		—
Total available-for-sale securities	$	6,298	$	6,281

Schedule of available-for-sale marketable securities with continuous gross unrealized loss position

	Less than 12 months					More than 12 months				Total
	Estimated fair value		Gross unrealized holding losses			Estimated fair value		Gross unrealized holding losses		Estimated fair value		Gross unrealized holding losses
As of September 30, 2023
US Treasury securities	$	3,278	$	(3	)	$	—	$	—	$	3,278	$	(3	)
Corporate bonds and notes		973		(16	)		—		—		973		(16	)
Total	$	4,251	$	(19	)	$	—	$	—	$	4,251	$	(19	)