FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of Financial Assets Subject to Fair Value Measurements on a Recurring Basis by Level Within the Fair Value Hierarchy

The following table sets forth the Company’s financial assets subject to fair value measurements on a recurring basis by level within the fair value hierarchy as of December 31, 2023 and 2022 (in thousands):

	December 31, 2023
									Reported As:
	Amortized cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Cash and cash equivalents		Short-Term Investments		Long-Term Investments
Cash	$	516,673	$	—	$	—	$	516,673	$	516,673	$	—	$	—
Level 1:
Money market funds	698,702		—		—		698,702		698,702		—		—
U.S. Treasury securities	2,033,711		2,480		(2,073)		2,034,118		104,572		1,638,537		291,009
Subtotal	2,732,413		2,480		(2,073)		2,732,820		803,274		1,638,537		291,009
Level 2:
Certificates of deposit	105,993		97		(22)		106,068		—		106,068		—
Time deposits	50,000		—		—		50,000		50,000		—		—
Commercial paper	299,248		191		(8)		299,431		—		299,431		—
Corporate debt securities	615,350		1,101		(669)		615,782		—		445,762		170,020
Subtotal	1,070,591		1,389		(699)		1,071,281		50,000		851,261		170,020
Total	$	4,319,677	$	3,869	$	(2,772)	$	4,320,774	$	1,369,947	$	2,489,798	$	461,029

	December 31, 2022
									Reported As:
	Amortized cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Cash and cash equivalents		Short-Term Investments		Long-Term Investments
Cash	$	321,667	$	—	$	—	$	321,667	$	321,667	$	—	$	—
Level 1:
Money market funds	1,377,540		—		—		1,377,540		1,377,540		—		—
U.S. Treasury securities	1,861,449		151		(9,431)		1,852,169		—		1,570,591		281,578
Subtotal	3,238,989		151		(9,431)		3,229,709		1,377,540		1,570,591		281,578
Level 2:
U.S. government agency securities	43,477		46		(18)		43,505		—		43,505		—
Certificates of deposit	174,037		67		(132)		173,972		—		173,972		—
Commercial paper	238,224		63		(122)		238,165		19,761		218,404		—
Corporate debt securities	438,148		208		(2,404)		435,952		16,797		170,759		248,396
Subtotal	893,886		384		(2,676)		891,594		36,558		606,640		248,396
Total	$	4,454,542	$	535	$	(12,107)	$	4,442,970	$	1,735,765	$	2,177,231	$	529,974

Schedule of Available-for-Sale Securities by Contractual Maturity

The following table summarizes our available-for-sale securities by contractual maturity:

	December 31, 2023
	Amortized cost		Estimated Fair Value
Within one year	$	2,491,627	$	2,489,798
After one year through three years	458,117		461,029
Total	$	2,949,744	$	2,950,827

Schedule of Reconciliation of Common Stock Warrant Liability Measured and Recorded at Fair Value on a Recurring Basis

The following table presents a reconciliation of the common stock warrant liability measured and recorded at fair value on a recurring basis (in thousands):

	Year Ended December 31,
	2023		2022
Fair value-beginning of period	$	140,590	$	1,394,808
Change in fair value	(86,926)		(1,254,218)
Fair value-end of period	$	53,664	$	140,590