Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Measurements

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

	March 31, 2020
	Total Fair Value		Level 1		Level 2		Level 3
Assets:
Money market funds	$	100,755	$	100,755	$	—	$	—
Commercial paper		57,710		—		57,710		—
Corporate bonds		49,122		—		49,122		—
Asset-backed securities		10,458		—		10,458		—
U.S. treasury notes		4,021		4,021		—		—
Total	$	222,066	$	104,776	$	117,290	$	—
Liabilities:
Derivative liability for Exit Fee	$	1,051	$	—	$	—	$	1,051
Total	$	1,051	$	—	$	—	$	1,051

	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