Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Measurement

Schedule of financial instruments measured at fair market value

	As of December 31, 2019
(in thousands)	Level 1		Level 2		Level 3		Total
Money market funds	$	82,411	$	—	$	—	$	82,411
Total	$	82,411	$	—	$	—	$	82,411

	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