FINANCIAL INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of Cash Cash Equivalents and Available-for-Sale Securities by Significant Investment Category

The following tables show the Company’s cash, cash equivalents and available-for-sale securities by significant investment category as of December 31, 2022 and 2021, respectively:


	December 31, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Aggregate Fair Value		Cash and Cash Equivalents		Short-term Marketable Securities (1)		Long-term Marketable Securities (2)
Level 1:
Cash	$	463,248	$	—	$	—	$	463,248	$	463,248	$	—	$	—

Level 2:
Money market instruments	248,933		—		—		248,933		248,933		—		—
Corporate debt securities	504,984		34		(11,541)		493,477		1,881		299,153		192,443
U.S. government agency securities	312,720		45		(3,771)		308,994		—		229,846		79,148
Commercial paper	48,103		11		(22)		48,092		10,469		37,623		—
Asset-backed securities	63,151		69		(592)		62,628		—		384		62,244

Subtotal	1,177,891		159		(15,926)		1,162,124		261,283		567,006		333,835
Total	$	1,641,139	$	159	$	(15,926)	$	1,625,372	$	724,531	$	567,006	$	333,835


	December 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Aggregate Fair Value		Cash and Cash Equivalents		Short-term Marketable Securities (1)		Long-term Marketable Securities (2)
Level 1:
Cash	$	301,177	$	—	$	—	$	301,177	$	301,177	$	—	$	—

Level 2:
Money market instruments	285,099		—		—		285,099		285,099		—		—
Corporate debt securities	584,000		386		(2,086)		582,300		—		200,304		381,996
U.S. government agency securities	224,774		182		(325)		224,631		—		146,421		78,210
Commercial paper	68,384		—		—		68,384		1,000		67,384		—
Asset-backed securities	56,936		10		(95)		56,851		—		9,451		47,400
Foreign and other	3,097		141		(12)		3,226		—		3,039		187
Subtotal	1,222,290		719		(2,518)		1,220,491		286,099		426,599		507,793
Total	$	1,523,467	$	719	$	(2,518)	$	1,521,668	$	587,276	$	426,599	$	507,793

(1)The Company’s short-term marketable securities mature in one year or less.

(2)The Company’s long-term marketable securities mature between one and five years.