Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of Assets Measured on Recurring Basis

The following table presents information about our assets that are measured at fair value on a recurring basis using the above input categories (in thousands):

	Fair Value Measurements as of December 31, 2019						Fair Value Measurements as of December 31, 2018
Description	Total		Level 1		Level 2		Total		Level 1		Level 2
Money market funds	$	360,471	$	360,471	$	—	$	52,068	$	52,068	$	—
Commercial paper	—		—		—		7,448		—		7,448
U.S. treasury debt securities	10,349		—		10,349		2,493		—		2,493
U.S. corporate debt securities	95,865		—		95,865		10,823		—		10,823
	$	466,685	$	360,471	$	106,214	$	72,832	$	52,068	$	20,764
Included in cash and cash equivalents	$	360,471					$	52,068
Included in marketable securities	$	106,214					$	20,764