Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2020

Fair Value Measurements

Summary of Fair Value Measurements of Company's Financial Assets and Liabilities

	June 30, 2020
	Total Fair Value		Level 1		Level 2		Level 3
Assets:
Money market funds	$	99,410	$	99,410	$	—	$	—
Commercial paper		46,443		—		46,443		—
Corporate bonds		35,289		—		35,289		—
Asset-backed securities		10,532		—		10,532		—
U.S. government-sponsored agency bonds		8,075		8,075
U.S. treasury notes		4,008		4,008		—		—
Total	$	203,757	$	111,493	$	92,264	$	—
Liabilities:
Derivative liability for Exit Fee	$	1,121	$	—	$	—	$	1,121
Total	$	1,121	$	—	$	—	$	1,121

	December 31, 2019
	Total Fair Value		Level 1		Level 2		Level 3
Assets:
Money market funds	$	147,208	$	147,208	$	—	$	—
Commercial paper		56,041		—		56,041		—
Corporate bonds		33,134		—		33,134		—
Asset-backed securities		8,005		—		8,005		—
Total	$	244,388	$	147,208	$	97,180	$	—
Liabilities:
Derivative liability for Exit Fee	$	969	$	—	$	—	$	969
Total	$	969	$	—	$	—	$	969