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INVESTMENTS (Tables)

3 Months Ended

Mar. 31, 2024

INVESTMENTS

Summary of investments in available-for-sale


														Continuous			Continuous
					Gross			Gross						Unrealized			Unrealized
					Unrealized			Unrealized						Loss Position			Loss Position
		Amortized			Holding			Holding			Fair			less than 12			greater than 12
March 31, 2024		Cost			Gains			Losses			Value			Months			Months
Available-for-sale
Short-term:
Commercial paper		$	157,074		$	11		$	—		$	157,085		$	—		$	—
Certificates of deposit			24,831			—			—			24,831			—			—
U.S. government agency securities			101,893			16			54			101,855			54			—
U.S. treasuries			530,697			23			390			530,330			390			—
Corporate bonds			170,198			32			130			170,100			130			—
Long-term:
Corporate bonds			8,205			—			43			8,162			43			—
Total		$	992,898		$	82		$	617		$	992,363		$	617		$	—


														Continuous			Continuous
					Gross			Gross						Unrealized			Unrealized
					Unrealized			Unrealized						Loss Position			Loss Position
		Amortized			Holding			Holding			Fair			less than 12			greater than 12
December 31, 2023		Cost			Gains			Losses			Value			Months			Months
Available-for-sale
Short-term:
Commercial paper		$	163,775		$	—		$	1		$	163,774		$	1		$	—
Certificates of deposit			15,590			—			—			15,590			—			—
Municipal securities			361			—			—			361			—			—
U.S. government agency securities			116,524			90			66			116,548			66			—
U.S. treasuries			412,936			205			1,084			412,057			1,084			—
Corporate bonds			247,340			89			154			247,275			154			—
Long-term:
U.S. government agency securities			23,485			51			5			23,531			5			—
U.S. treasuries			35,896			79			8			35,967			8			—
Corporate bonds			16,903			32			2			16,933			2			—
Total		$	1,032,810		$	546		$	1,320		$	1,032,036		$	1,320		$	—

Summary of the underlying contractual maturities of investments


		March 31, 2024						December 31, 2023
		Amortized Cost			Fair Value			Amortized Cost			Fair Value
Less than 1 year:
Commercial paper		$	157,074		$	157,085		$	163,775		$	163,774
Municipal securities			—			—			361			361
U.S. government agency securities			101,893			101,855			116,524			116,548
Certificates of deposit			24,831			24,831			15,590			15,590
U.S. treasuries			530,697			530,330			412,936			412,057
Corporate bonds			170,198			170,100			247,340			247,275
Due 1 - 10 years:
U.S. treasuries			—			—			35,896			35,967
U.S. government agency securities			—			—			23,485			23,531
Corporate bonds			8,205			8,162			16,903			16,933
Total		$	992,898		$	992,363		$	1,032,810		$	1,032,036