Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2020

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):

As of March 31, 2020	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market fund	$	149,517	$	—	$	—	$	149,517
Short-term investments:
Corporate debt securities	—		67,924		—		67,924
U.S. government-related debt securities	—		26,732		—		26,732
Asset-backed securities	—		8,948		—		8,948
Corporate equity securities	9,158		—		—		9,158
Total	$	158,675	$	103,604	$	—	$	262,279
As of December 31, 2019	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market fund	$	22,152	$	—	$	—	$	22,152
Short-term investments:
Corporate debt securities	—		78,330		—		78,330
U.S. government-related debt securities	—		27,003		—		27,003
Asset-backed securities	—		11,971		—		11,971
Corporate equity securities	10,518		—		—		10,518
Total	$	32,670	$	117,304	$	—	$	149,974