Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Company's Available-for-Sale Securities by Level within Fair Value Hierarchy

The Company’s investments by level within the fair value hierarchy were as follows (in thousands):

	Fair value measurement using:
Type of securities as of September 30, 2021	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market fund	$	94,814	$	—	$	—	$	94,814
Short-term investments:
Corporate debt securities	—		197,732		—		197,732
Government-related debt securities	—		33,174		—		33,174
Asset-backed securities	—		31,781		—		31,781
Total	$	94,814	$	262,687	$	—	$	357,501
	Fair value measurement using:
Type of securities as of December 31, 2020	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market fund	$	400,757	$	—	$	—	$	400,757
Short-term investments:
Corporate debt securities	—		22,409		—		22,409
Government-related debt securities	—		5,003		—		5,003
Asset-backed securities	—		1,471		—		1,471
Total	$	400,757	$	28,883	$	—	$	429,640