Fair Value of Investments (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value of Investments

Summary of fair value financial assets measured on a recurring basis

	(Level 1)		(Level 2)		(Level 3)		Total
March 31, 2020
Assets:
Money market funds	$	28,728	$	—	$	—	$	28,728
U.S. government securities		4,579		—		—		4,579
Corporate bonds		—		14,833		—		14,833
Commercial paper		—		22,629		—		22,629
Asset-backed securities		—		5,104		—		5,104
Total assets	$	33,307	$	42,566	$	—	$	75,873
	(Level 1)		(Level 2)		(Level 3)		Total
December 31, 2019
Assets:
Money market funds	$	26,812	$	—	$	—	$	26,812
U.S. government securities		4,544		—		—		4,544
Corporate bonds		—		17,754		—		17,754
Commercial paper		—		24,679		—		24,679
Asset-backed securities		—		13,808		—		13,808
Total assets	$	31,356	$	56,241	$	—	$	87,597