Fair Value Disclosure (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of Financial Assets Measured at Fair Value

The Company’s financial assets measured at fair value are as follows (in thousands):

	As of December 31, 2019						As of December 31, 2018
	Fair Value		Level 1		Level 2		Fair Value		Level 1		Level 2
Assets:
Cash and cash equivalents:
Cash	$	463,820	$	463,820	$	—	$	147,221	$	147,221	$	—
Money market funds		51,659		51,659		—		8,343		8,343		—
Restricted cash		1,854		1,854		—		—		—		—
Short-term investments:
Corporate bonds and commercial paper		—		—		—		37,151		—		37,151
U.S. government securities		—		—		—		4,995		—		4,995
Total assets measured and recorded at fair value	$	517,333	$	517,333	$	—	$	197,710	$	155,564	$	42,146

Schedule of Level 3 Instruments

The following table represents the activity of Level 3 instruments (in thousands):

	Year Ended
	December 31, 2017
Convertible preferred stock warrant liability — beginning balance	$	9,990
Fair value of new warrants issued		2,032
Change in fair value of preferred stock warrant liability*		40,333
Reclassification to additional paid in capital upon conversion to common warrants		(52,355	)
Convertible preferred stock warrant liability — ending balance	$	—

* Recognized in the consolidated statements of operations within other income (expense), net.