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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Taxes

Schedule of United States and foreign loss before income taxes

United States and foreign (loss) income before income taxes was as follows (in thousands):

​	​	​	​	​	​	​	​	​	​	​
​	​	Year ended December 31,
​	​	2021		​	2020		​	2019
United States		$	(51,370)		$	(134,096)		$	(50,339)	​
Foreign	​		2,103	​		1,782	​		303	​
Total	​	$	(49,267)	​	$	(132,314)	​	$	(50,036)	​

Schedule of the provision for income taxes

The income tax provision (benefit) was as follows (in thousands):

​	​	​	​	​	​	​	​	​	​	​
​	​	December 31,
​	​	2021		​	2020		​	2019
Current:		​			​			​		​
Federal	​	$	—	​	$	(949)	​	$	237	​
State	​		189	​		275	​		122	​
Foreign	​		1,162	​		715	​		487	​
​	​		1,351	​		41	​		846	​
Deferred:	​	​	​	​	​	​	​	​	​	​
Federal	​		264	​		(10,098)	​		(58,368)	​
State	​		(1,234)	​		(1,952)	​		(7,938)	​
Foreign	​		(55)	​		43	​		—	​
​	​		(1,025)	​		(12,007)	​		(66,306)	​
Income tax provision (benefit)	​	$	326	​	$	(11,966)	​	$	(65,460)	​

Schedule of reconciliations of the U.S. federal statutory tax rate to the combined effective tax rate

​

​	​	​	​	​	​	​	​	​	​
​	​	Year ended
​	​	December 31,
(amounts in thousands)	​	2021	​	​	2020	​	​	2019
Statutory rate of tax benefit	$	(10,346)	​	$	(27,713)	​	$	(10,508)	​
State income taxes, net of federal benefit		(3,395)	​	​	(4,674)	​	​	(2,418)	​
Permanent and other items		4,513	​	​	263	​	​	4,371	​
Stock-based compensation		(12,310)	​	​	(3,537)	​	​	(5,006)	​
Research credits		(5,408)	​	​	(5,082)	​	​	(3,594)	​
Uncertain tax positions		2,685	​	​	3,835	​	​	1,780	​
Change in tax rate		(802)	​	​	1,303	​	​	419	​
NOL Carryback Claim	​	-	​	​	(447)	​	​	-	​
ASU 2016-09 Implementation & ASC 842 Adoption in 2019	​	-	​	​	-	​	​	(104)	​
Valuation allowance		25,389	​	​	24,086	​	​	(50,400)	​
Income tax provision (benefit)	$	326	​	$	(11,966)	​	$	(65,460)	​

Schedule of significant components of the Company's deferred tax assets

Significant components of the Company’s net deferred tax assets at December 31, 2021 and December 31, 2020 are as follows (in thousands):

​	​	​	​	​	​	​	​
​	​	December 31,
​	​	2021		​	2020
Deferred tax assets:					​		​
Net operating loss carryforwards		$	100,464	​	$	87,684	​
Tax credits	​	​	16,968	​		14,293	​
Stock-based compensation	​	​	15,521	​	​	19,972	​
Reserves and accruals	​	​	10,241	​	​	9,013	​
Lease liability	​	​	25,188	​	​	20,434	​
Other, net	​	​	2,120	​	​	—	​
Total deferred tax assets	​	$	170,502	​	$	151,396	​
​	​	​	​	​	​	​	​
Deferred tax liabilities:	​	​	​	​	​	​	​
Depreciation and amortization	​	​	(67,641)	​	​	(76,034)	​
ROU Lease Asset	​	​	(18,747)	​	​	(17,471)	​
Convertible Notes	​	​	—	​	​	(22,252)	​
Other, net	​	​	—	​	​	(542)	​
Inventory	​	​	(59)	​	​	(59)	​
Total deferred tax liabilities	​	$	(86,447)	​	$	(116,358)	​
​	​	​	​	​	​	​	​
Valuation allowance	​		(91,373)	​		(45,551)	​
Net deferred tax liability	​	$	(7,318)	​	$	(10,513)	​

Schedule of reconciliation of the beginning and ending amount of gross unrecognized tax benefits, excluding interest and penalties

A reconciliation of the beginning and ending amount of gross unrecognized tax benefits for the years ended December 31, 2021, December 31, 2020 and December 31, 2019 excluding interest and penalties, is as follows (in thousands):

​	​	​	​	​	​	​	​	​	​
​	​	December 31,
​	​	2021		​	2020		​	2019
Balance at beginning of the year		$	22,803		$	15,076		$	13,486
Net addition for tax positions - prior years	​	​	505	​	​	4,987	​	​	230
Net additions for tax positions - current year	​	​	3,489	​		3,355	​		2,339
Subtractions from tax positions - prior years	​	​	(327)	​	​	(74)	​	​	(537)
Subtractions from tax positions - current year	​	​	(654)	​	​	(541)	​	​	(442)
Balance at end of the year	​	$	25,816	​	$	22,803	​	$	15,076

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

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Tabular disclosure of the change in unrecognized tax benefits.

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