Fair Value Measurement (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Measurement

Schedule of financial instruments measured at fair market value

	As of September 30, 2019
(in thousands)	Level 1		Level 2		Level 3		Total
Money market funds	$	43,930	$	—	$	—	$	43,930
Corporate debt securities		—		930		—		930
U.S. treasuries		—		3,897		—		3,897
Commercial paper		—		36,191		—		36,191
Total	$	43,930	$	41,018	$	—	$	84,948

	As of December 31, 2018
(in thousands)	Level 1		Level 2		Level 3		Total
Money market funds	$	36,617	$	—	$	—	$	36,617
Corporate debt securities		—		6,555		—		6,555
Commercial paper		—		53,598		—		53,598
Total	$	36,617	$	60,153	$	—	$	96,770