Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of fair value hierarchy

The following table represents the Company's fair value hierarchy for its financial assets and liabilities (in thousands):

	Fair Value at March 31, 2021						Fair Value at December 31, 2020
Assets	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
Money market funds(1)	$	233,344	$	—	$	—	$	96,116	$	—	$	—
Government-backed securities(1)	—		54,250		—		—		44,250		—
Treasury securities(2)	—		25,022		—		—		54,088		—
Corporate debt securities(3)	—		1,549,387		—		—		373,681		—
Agency securities	—		—		—		—		20,600		—
Total cash equivalents and marketable securities	$	233,344	$	1,628,659	$	—	$	96,116	$	492,619	$	—
Liabilities
Convertible notes payable	$	—	$	533,705	$	—	$	—	$	407,238	$	—

(1)Classified as cash and cash equivalents as of March 31, 2021 and December 31, 2020, respectively, on the consolidated balance sheets.

(2)Includes $25,022 and $44,052 classified as cash and cash equivalents as of March 31, 2021 and December 31, 2020, respectively, on the consolidated balance sheets.

(3)Includes $1,547,137 and $246,668 classified as cash and cash equivalents as of March 31, 2021 and December 31, 2020, respectively, on the consolidated balance sheets.