Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of Loss Before Income Taxes

Our loss before income taxes consists of the following (in thousands):

	Year Ended December 31,
	2021		2020		2019
Domestic	$	(56,291)	$	(46,277)	$	(59,900)
International	(7,369)		(7,824)		(6,805)
Loss before income taxes	$	(63,660)	$	(54,101)	$	(66,705)

Schedule of Significant Components of Provision for Income Taxes

Significant components of our benefit for income taxes are as follows (in thousands):

	Year Ended December 31,
	2021		2020		2019
Current:
Federal	$	—	$	—	$	—
State	(63)		(31)		(31)
Foreign	167		(2,314)		(568)
Total current tax (expense) benefit	104		(2,345)		(599)
Deferred:
State	—		—		—
Foreign	4,319		3,426		2,514
Total deferred benefit	4,319		3,426		2,514
Total benefit for income taxes	$	4,423	$	1,081	$	1,915

Schedule of Reconciliation of Income Taxes at Statutory Rate to (Provision for)/Benefit from Income Taxes Recorded in Statements of Operations

Reconciliation of income taxes at the statutory rate to the benefit from income taxes recorded in the statements of operations is as follows:

	Year Ended December 31,
	2021		2020		2019
Tax benefit at federal statutory rate	21.0	%	21.0	%	21.0	%
State tax expense, net of federal benefit	2.8		1.7		0.9
Foreign tax benefit (expense)	4.7		(0.9)		(0.1)
Change in valuation allowance	(15.5)		(11.4)		(6.0)
Federal research and development credit	0.7		1.1		0.7
Unrecognized tax benefit	(0.1)		(0.1)		(0.1)
Non-deductible interest/premium	(1.0)		(1.1)		(7.9)
Global Intangible Low-Tax Income (GILTI)	—		(3.9)		(5.6)
Net operating loss expiration	(2.9)		(3.3)		—
Executive stock-based compensation	(1.3)		—		—
Other, net	(1.5)		(1.1)		—
Effective tax rate	6.9	%	2.0	%	2.9	%

Schedule of Significant Components of Deferred Tax Assets and Liabilities

Significant components of our deferred tax assets and liabilities are as follows (in thousands):

	December 31,
	2021		2020
Deferred tax assets:
Net operating loss carryforwards	$	115,739	$	104,785
Reserves and accruals	3,473		5,242
Depreciation and amortization	1,931		2,819
Tax credit carryforwards	20,480		18,268
Stock-based compensation	2,871		3,168
Right-of-use lease liability	9,322		9,451
Total gross deferred tax assets	153,816		143,733
Valuation allowance on deferred tax assets	(141,087)		(131,232)
Total deferred tax assets, net of valuation allowance	12,729		12,501
Deferred tax liabilities:
Fixed assets and intangibles	(8,416)		(12,272)
Right-of-use asset	(8,459)		(8,694)
Total deferred tax liabilities	(16,875)		(20,966)
Net deferred tax liability	$	(4,146)	$	(8,465)
Deferred tax liability per balance sheet	$	(4,329)	$	(8,697)
less deferred tax assets included in other long-term assets	183		232
Net deferred tax liability	$	(4,146)	$	(8,465)

Schedule of Summary of Valuation Allowance

A reconciliation of the beginning and ending amount of the valuation allowance for the years ended December 31, 2021, 2020, and 2019 is as follows (in thousands):

	Valuation Allowance
December 31, 2018	$	126,108
Charges to earnings	—
Charges to other accounts	3,976
December 31, 2019	130,084
Charges to earnings	—
Charges to other accounts	1,142
December 31, 2020	$	131,226
Charges to earnings	—
Charges to other accounts	9,861
December 31, 2021	$	141,087

Schedule of Aggregate Changes in Balance of Gross Unrecognized Tax Benefits

The aggregate changes in the balance of our gross unrecognized tax benefits during 2021, 2020, and 2019 were as follows (in thousands):

December 31, 2018	$	7,344
Increases in balances related to tax positions during a prior period	155
Increases in balances related to tax positions taken during current period	354
Decreases in balances related to tax positions taken during prior period	(20)
December 31, 2019	7,833
Increases in balances related to tax positions during a prior period	756
Increases in balances related to tax positions taken during current period	441
Decreases in balances related to tax positions taken during prior period	(144)
December 31, 2020	$	8,886
Increases in balances related to tax positions during a prior period	25
Increases in balances related to tax positions taken during current period	325
Decreases in balances related to tax positions taken during prior period	(721)
December 31, 2021	$	8,515