Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Taxes

Schedule of income (loss) from continuing operations before income taxes

	Year ended December 31,
	2021		2020		2019
	(in thousands)
Domestic	$	23,561	$	(10,292)	$	(78,486)
Foreign		2,119		1,828		530
Total	$	25,680	$	(8,464)	$	(77,956)

Schedule of components of the expense (benefit) for income taxes

	Year ended December 31,
	2021		2020		2019
	(in thousands)
Current:
Federal	$	—	$	—	$	—
Foreign		183		22		304
State and local		110		204		113
Total current expense (benefit) for income taxes		293		226		417
Deferred:
Federal		119		136		162
Foreign		(507)		(320)		116
State and local		(263)		(115)		82
Total deferred expense (benefit) for income taxes		(651)		(299)		360
Total expense (benefit) for income taxes	$	(358)	$	(73)	$	777

Schedule of reconciliation of the income tax expense computed using the Federal statutory rate to actual income tax provision

	Year ended December 31,
	2021		2020		2019
	(in thousands)
Income tax expense (benefit) at U.S. statutory rates	$	5,393	$	(1,777)	$	(16,396)
State taxes, net of U.S. federal impact		(607)		(121)		(835)
Effect of international operations		609		(131)		785
Research and development tax credit		(3,964)		726		(1,692)
Net change in valuation allowance		(2,389)		388		15,098
Change in accrual for unrecognized tax benefits		398		(6)		1,232
Share-based compensation		1,208		2,248		1,947
Asset impairment		—		728		495
Partial extinguishment of 2023 Notes		(1,090)		(2,292)		—
Other		84		164		143
Total expense (benefit) for income taxes	$	(358)	$	(73)	$	777

Schedule of deferred tax assets and liabilities

	December 31,
	2021		2020
	(in thousands)
Deferred tax assets:
Inventory valuation	$	11,822	$	10,949
Net operating losses		38,816		51,260
Credit carry forwards		57,810		54,160
Warranty and installation accruals		1,730		1,045
Share-based compensation		4,033		4,587
Customer deposits and deferred revenue		9,908		10,982
Operating leases		8,464		2,281
Other		5,880		4,741
Total deferred tax assets		138,463		140,005
Valuation allowance		(116,054)		(118,443)
Net deferred tax assets		22,409		21,562
Deferred tax liabilities:
Purchased intangible assets		6,633		7,227
Convertible Senior Notes		10,018		13,674
Operating leases		6,539		2,241
Depreciation		2,372		2,220
Total deferred tax liabilities		25,562		25,362
Net deferred taxes	$	(3,153)	$	(3,800)

Schedule of reconciliation of beginning and ending amount of uncertain tax positions

	December 31,
	2021		2020		2019
	(in thousands)
Balance at beginning of year	$	12,363	$	12,369	$	11,137
Additions for tax positions related to current year		2,642		1,217		3,075
Additions for tax positions related to prior years		50		47		21
Reductions for tax positions related to prior years		(1,196)		(1,166)		(1,814)
Reductions due to the lapse of the statute of limitations		—		—		—
Settlements		(1,098)		(104)		(50)
Balance at end of year	$	12,761	$	12,363	$	12,369