Investments (Tables)

6 Months Ended

Jun. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule of Short-Term Investments

The following tables summarize the Company’s short-term investments (in thousands):

		As of June 30, 2021
	Maturity	Amortized cost		Gross unrealized gains		Gross unrealized losses		Estimated fair value
Corporate debt securities	2 years or less	$	192,772	$	29	$	(79)	$	192,722
Commercial paper	1 year or less	538,800		99		—		538,899
U.S. Agency bonds	1 year or less	116,498		29		—		116,527
U.S. Treasury bills	2 years or less	58,566		10		(3)		58,573
Sovereign debt securities	1 year or less	9,072		—		(4)		9,068
		$	915,708	$	167	$	(86)	$	915,789

		As of December 31, 2020
	Maturity	Amortized cost		Gross unrealized gains		Gross unrealized losses		Estimated fair value
Corporate debt securities	2 years or less	$	130,814	$	160	$	(4)	$	130,970
Commercial paper	1 year or less	240,725		58		(18)		240,765
U.S. Agency bonds	2 years or less	83,227		37		(1)		83,263
U.S. Treasury bills	2 years or less	49,539		10		(3)		49,546
		$	504,305	$	265	$	(26)	$	504,544