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Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2024

Marketable Securities

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, 2024
Available-for-sale securities:
Mutual funds		$	1,150			$	4			$	(2	)		$	1,152
Certificates of deposit			206				—				—				206
Total available-for-sale securities		$	1,356			$	4			$	(2	)		$	1,358

		Amortized cost				Gross unrealized holding gains				Gross unrealized holding losses				Estimated fair value
December 31, 2023
Available-for-sale securities:
US Treasury securities		$	1,804			$	—			$	(1	)		$	1,803
Mutual funds			1,498				7				—				1,505
Certificates of deposit			103				—				—				103
Corporate debt securities		$	1,007			$	—			$	(22	)		$	985
Total available-for-sale securities		$	4,412			$	7			$	(23	)		$	4,396

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

		Amortized cost				Estimated fair value
Due within one year		$	1,136			$	1,136
Due after one year through five years			220				222
Total available-for-sale securities		$	1,356			$	1,358

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, 2024
Mutual Funds		$	1,152			$	(2	)		$	—			$	—			$	1,152			$	(2	)
Certificates of Deposit			206				—				—				—				206				—
Total		$	1,358			$	(2	)		$	—			$	—			$	1,358			$	(2	)

		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 December 31, 2023
US Treasury securities		$	1,803			$	(1	)		$	—			$	—			$	1,803			$	(1	)
Mutual Funds			1,505				—				—				—				1,505				—
Certificates of Deposit			103				—				—				—				103				—
Corporate debt securities			985				(22	)			—				—				985				(22	)
Total		$	4,396			$	(23	)		$	—			$	—			$	4,396			$	(23	)