Fair Value Measurement (Tables)

6 Months Ended

Jun. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of financial assets and financial liabilities measured at fair value on a recurring basis

The following table summarizes the Company's financial assets and financial liabilities that are measured at fair value on a recurring basis:

	June 30, 2021
(in thousands)	Level 1		Level 2		Level 3		Total
Financial assets:
Cash and cash equivalents
Money market trust	$	483,755	$	—	$	—	$	483,755
Money market funds	35,293		—		—		35,293
Restricted cash
Time deposit	107,500		—		—		107,500
Money market trust	63,821		—		—		63,821
Long-term restricted cash
Time deposit	1,929		—		—		1,929
Money market account	2,501		—		—		2,501
Total financial assets	$	694,799	$	—	$	—	$	694,799

	December 31, 2020
(in thousands)	Level 1		Level 2		Level 3		Total
Financial assets:
Cash and cash equivalents
Money market trust	$	629,393	$	—	$	—	$	629,393
Money market funds	35,641		—		—		35,641
Restricted cash
Time deposit	144,949		—		—		144,949
Other current assets
Time deposit	18,382		—		—		18,382
Long-term restricted cash
Time deposit	4,898		—		—		4,898
Total financial assets	$	833,263	$	—	$	—	$	833,263
Financial liabilities:
Derivative instrument	$	—	$	—	$	—	$	—
Total financial liabilities	$	—	$	—	$	—	$	—

Schedule of significant unobservable inputs used in the fair value measurement of derivative instruments

The following table summarizes information about the significant unobservable inputs used in the fair value measurement of the Company’s derivative instrument:

(in thousands)	December 31, 2020
	Fair Value		Valuation Technique	Unobservable Inputs	Input Amount
Derivative instrument	$	—	Valuation of convertible notes with and without the derivative instrument. Incorporates a discounted cash flow model and option pricing model.	Discount rate	14	%
				Equity value: Long-term revenue growth rate	3.5	%
				Equity value: Revenue market multiple	1.3x - 1.5x