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Investments (Tables)

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Investments

Available-for-sale investments consisted of the following as of December 31, 2022 and 2021 (in thousands):


		December 31, 2022
		Amortized Cost				Unrealized Gain				Unrealized Loss				Estimated Fair Value
Short-term marketable securities
Commercial paper		$	9,969			$	—			$	—			$	9,969
U.S. government debt securities			389,898				14				(4,064	)			385,848
Corporate bonds			12,415				—				(66	)			12,349
Total short-term marketable securities		$	412,282			$	14			$	(4,130	)		$	408,166


		December 31, 2021
		Amortized Cost				Unrealized Gain				Unrealized Loss				Estimated Fair Value
Short-term marketable securities
U.S. government debt securities		$	186,752			$	4			$	(109	)		$	186,647
Corporate bonds			27,363				—				(14	)			27,349
Total short-term marketable securities		$	214,115			$	4			$	(123	)		$	213,996
Long-term marketable securities
U.S. government debt securities		$	205,472			$	—			$	(974	)		$	204,498
Corporate bonds			12,691				—				(44	)			12,647
Total long-term marketable securities		$	218,163			$	—			$	(1,018	)		$	217,145

Schedule of Gross Unrealized Holding Losses and Fair Value for Investments in Unrealized Loss Position

The following table presents the gross unrealized holding losses and fair value for investments in an unrealized loss position, and the length of time individual securities have been in a continuous loss position, as of December 31, 2022 (in thousands):


		Less Than 12 Months								12 Months Or Greater
		Fair Value				Unrealized Loss				Fair Value				Unrealized Loss
U.S. government debt securities		$	130,541			$	(346	)		$	201,153			$	(3,718	)
Corporate bonds			—				—				12,349				(66	)
Total available-for-sale securities		$	130,541			$	(346	)		$	213,502			$	(3,784	)