Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Summary of Income Tax Expense

Income tax expense is comprised of the following:

	Year ended December 31,
	2021		2020		2019
Current:
Federal	$	—	$	—	$	583
State		67		178		(95	)
Foreign		344		167		(779	)
Current income tax expense (benefit)		411		345		(291	)
Deferred:
Federal		—		—		—
State		—		—		—
Deferred income tax expense (benefit)		—		—		—
	$	411	$	345	$	(291	)

Schedule of Components of Loss Before Income Taxes by Tax Jurisdiction

Components of loss before income taxes by tax jurisdiction were as follows:

	Year ended December 31,
	2021			2020			2019
United States	$	(101,341	)	$	(24,567	)	$	(25,385	)
Foreign		1,359			449			523
Loss before income taxes	$	(99,982	)	$	(24,118	)	$	(24,862	)

Schedule of Reconciliation of Income Tax Expense Applicable Statutory Income Tax Rates to Effective Income Tax Rate

Reconciliation of income tax expense at the applicable statutory income tax rates to the effective income tax rate is as follows:

	Year ended December 31,
	2021			2020			2019
Statutory federal income tax rate		21.0	%		21.0	%		21.0	%
State taxes, net of federal benefits		4.9			14.2			4.2
Withholding tax		—			—			(2.3	)
Section 162(m) limitation		(5.2	)		(12.8	)		—
Stock compensation		12.4			68.5			0.2
Return-to-provision adjustments		(1.7	)		(1.3	)		3.2
Research and development credit		6.3			6.2			5.2
Tax contingencies, net of reversals		(0.7	)		(0.6	)		(0.5	)
Change in valuation allowance		(37.2	)		(95.0	)		(31.3	)
Other		(0.2	)		(1.6	)		(0.6	)
Effective income tax rate		(0.4	)%		(1.4	)%		(0.9	)%

Schedule of Tax Effects of Temporary Differences that Give Rise to Significant Portions of Deferred Income Tax Assets and Deferred Income Tax Liabilities

Tax effects of temporary differences that give rise to significant portions of deferred income tax assets and deferred income tax liabilities were as follows:

	As of December 31,
	2021			2020			2019
Deferred income tax assets:
Net operating loss carryforwards	$	67,985		$	51,498		$	26,119
Accrued expenses		10,309			7,918			6,164
Deferred Revenue		10,632			394			500
Lease Liabilities		18,773			2,165			433
Credits		14,559			8,752			7,468
Gross deferred tax assets		122,258			70,727			40,684
Less valuation allowance		(95,304	)		(58,155	)		(35,251	)
Net deferred tax assets		26,954			12,572			5,433
Deferred income tax liabilities:
Unrealized gain on equity investments		(8,545	)		(10,185	)		(1,984	)
Prepaid expenses		(969	)		(889	)		(441	)
Depreciation and amortization		(17,440	)		(1,498	)		(3,008	)
Net deferred income tax assets	$	—		$	—		$	—

Schedule of Reconciliation of Total Gross Unrecognized Tax Benefits

The Company classifies interest and penalties related to unrecognized tax benefits within income tax expense in the consolidated statement of operations. Following is a reconciliation of total gross unrecognized tax benefits:

	Year ended December 31,
	2021			2020			2019
Balance, January 1	$	1,046		$	902		$	781
Additions for tax positions taken in prior years		282			25			24
Reductions for tax positions taken in prior years		(20	)		(16	)		(12	)
Additions for tax positions related to the current year		394			135			109
Balance, December 31	$	1,702		$	1,046		$	902