Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis

The table below summarizes the fair value of the Company’s marketable securities measured at fair value on a recurring basis based on the three-tier fair value hierarchy:

	December 31, 2019
	Level 1		Level 2		Level 3		Total
	(in thousands)
Marketable securities
Money market funds	$	3,068	$	—	$	—	$	3,068
U.S. treasury securities	67,083		—		—		67,083
Corporate bonds	—		10,375		—		10,375
Commercial paper	—		7,660		—		7,660
Total marketable securities	$	70,151	$	18,035	$	—	$	88,186
	December 31, 2018
	Level 1		Level 2		Level 3		Total
	(in thousands)
Marketable securities
Money market funds	$	15,223	$	—	$	—	$	15,223
U.S. treasury securities	66,489		—		—		66,489
Corporate bonds	—		19,720		—		19,720
Commercial paper	—		18,529		—		18,529
Total marketable securities	$	81,712	$	38,249	$	—	$	119,961