Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 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):

Type of securities as of December 31, 2021	Fair value measurement using:
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market fund	$	98,247	$	—	$	—	$	98,247
Short-term investments:
Corporate debt securities	—		177,183		—		177,183
U.S. government-related debt securities	—		33,039		—		33,039
Asset-backed securities	—		31,599		—		31,599
Total	$	98,247	$	241,821	$	—	$	340,068

Type of securities as of December 31, 2020	Fair value measurement using:
	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
U.S. government-related debt securities	—		5,003		—		5,003
Asset-backed securities	—		1,471		—		1,471
Total	$	400,757	$	28,883	$	—	$	429,640