Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of Loss Before Provision for Income Taxes

Loss before provision for income taxes was as follows:

	Year Ended December 31,
	2021			2020			2019
	(in thousands)
United States	$	(89,000	)	$	(96,555	)	$	(63,200	)
Foreign		15,182			15,740			12,427
Total	$	(73,818	)	$	(80,815	)	$	(50,773	)

Components of Income Tax (Provision) Benefit

The (provision) benefit for income taxes consists of the following:

	Year Ended December 31,
	2021			2020			2019
	(in thousands)
Current income tax provision
Federal	$	(709	)	$	(406	)	$	(238	)
State		(570	)		(487	)		(241	)
Foreign		(5,609	)		(5,508	)		(3,293	)
Total current income tax provision		(6,888	)		(6,401	)		(3,772	)
Deferred income tax benefit (expense)
Federal		989			(116	)		160
State		—			—			—
Foreign		1,880			2,301			639
Total deferred income tax benefit		2,869			2,185			799
Total income tax provision	$	(4,019	)	$	(4,216	)	$	(2,973	)

Schedule of Differences Between Income Taxes Computed at the Federal Statutory Rate and the Provision for Income Taxes

The following reconciles the differences between income taxes computed at the federal statutory rate of 21% for 2021, 2020 and 2019 and the provision for income taxes:

	Year Ended December 31,
	2021			2020			2019
	(in thousands)
Expected income tax benefit at the federal statutory rate	$	15,459		$	16,899		$	10,665
State taxes net of federal benefit		13,975			4,618			3,700
Stock-based compensation		79,800			25,196			16,055
Executive compensation limitation		(9,000	)		(3,004	)		(7,244	)
Difference in foreign tax rates		486			830			693
U.S. tax credits		15,995			11,529			24,170
GILTI inclusion		—			—			(1,645	)
Meals and entertainment		(450	)		(478	)		(1,208	)
Acquisition		1,033			—			—
Foreign withholding taxes		(1,006	)		(536	)		(375	)
Change in valuation allowance		(119,843	)		(62,182	)		(47,523	)
Other		(468	)		2,912			(261	)
Income tax provision	$	(4,019	)	$	(4,216	)	$	(2,973	)

Components of the Company's Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets and liabilities were as follows:

	Year Ended December 31,
	2021			2020
	(in thousands)
Deferred tax assets:
Net operating loss carryforwards	$	295,430		$	190,555
Research and investment credits		62,710			46,729
Accruals and reserves		17,508			15,278
Depreciation		2,532			2,223
Intangible assets		—			164
Stock-based compensation		9,622			7,354
Interest expense		9,705			8,650
Total deferred tax assets		397,507			270,953
Deferred tax liabilities:
Intangible assets		(2,474	)		(2,546	)
Convertible debt		(16,911	)		(21,873	)
Capitalized costs		(27,665	)		(17,009	)
Depreciation		(234	)		(231	)
Total deferred tax liabilities		(47,284	)		(41,659	)
Valuation allowance		(346,381	)		(227,062	)
Net deferred tax assets	$	3,842		$	2,232

Summary of Activity Related to Unrecognized Tax Benefits

The following summarizes activity related to unrecognized tax benefits:

	Year Ended December 31,
	2021		2020		2019
	(in thousands)
Unrecognized benefit—beginning of the year	$	8,448	$	5,445	$	3,925
Gross increases—current period positions		4,375		3,003		2,387
Gross decrease—prior period positions		—		—		(867	)
Unrecognized benefit—end of period	$	12,823	$	8,448	$	5,445