INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2022

INCOME TAXES

Schedule of Components of Income Tax Expense (Benefit)

	Year Ended December 31,
	2022		2021		2020
	(In thousands)
U.S.
Current	$	1,210	$	(67)	$	(1,325)
Deferred		13		1,318		21,056
Foreign
Current		577		237		238
Withholding		2,111		1,591		2,392
Deferred		(12)		92		(58)
Total income tax expense	$	3,899	$	3,171	$	22,303

Schedule of Effective Income Tax Rate Reconciliation

The income tax expense differs from the amount estimated by applying the statutory federal income tax rate (21% for 2022, 2021 and 2020) for the following reasons (in thousands):

	Year Ended December 31,
	2022		2021		2020
Federal statutory tax expense	$	106	$	(3,847)	$	(3,793)
State tax provision		949		239		703
Stock compensation expense		(898)		(499)		(602)
Tax credits		(2,877)		(2,676)		(3,488)
Foreign tax, net		2,195		1,653		2,443
Foreign-derived intangible income (FDII) deduction		(830)		—		—
Change in valuation allowance		5,122		8,099		29,034
Unrealized tax benefit reserve changes		136		(151)		—
Business combination costs		—		—		356
Tax law changes		—		—		(2,237)
Other		(4)		353		(113)
Total income tax expense	$	3,899	$	3,171	$	22,303

Schedule of Deferred Tax Assets and Liabilities

The components of the net deferred tax assets are comprised of (in thousands):

	December 31,
	2022		2021
Deferred tax assets
Net operating loss carry forward	$	3,861	$	13,149
Research and development and other credit carry forward		28,046		26,591
Foreign tax credit carry forward		11,764		11,010
Capitalized research and experimental expenses		10,069		—
Accruals deductible in different periods		7,713		3,362
Leases		1,623		1,472
Stock-based compensation		1,948		1,442
Total deferred tax assets		65,024		57,026
Less: valuation allowance		(59,215)		(51,586)
Deferred tax assets, net of valuation allowance	$	5,809	$	5,440
Deferred tax liabilities
Property and equipment, net		(540)		178
Operating lease right-of-use assets		(1,635)		(1,472)
Intangible assets		(3,617)		(4,129)
Deferred tax liabilities	$	(5,792)	$	(5,423)
Net deferred tax assets	$	17	$	17

Schedule of Unrecognized Tax Benefits Roll Forward

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):

	Amount
Gross unrecognized tax benefits, January 1, 2020	$	13,615
Increases in tax positions for current year		1,024
Increases in tax positions for prior years		71
Lapse in statute of limitations		(410)
Gross unrecognized tax benefits, December 31, 2020		14,300
Increases in tax positions for current year		853
Increases in tax positions for prior years		1
Lapse in statute of limitations		(411)
Gross unrecognized tax benefits, December 31, 2021		14,743
Increases in tax positions for current year		988
Increases in tax positions for prior years		—
Lapse in statute of limitations		(622)
Gross unrecognized tax benefits, December 31, 2022	$	15,109

Summary of Valuation Allowance

Valuation allowance for deferred tax assets is summarized (in thousands):

	Balance at		Charged to		Deductions/		Balance at
	Beginning		Costs and		Write-offs of		End of
	of Period		Expenses		Accounts		Period
Valuation allowance for deferred tax assets
2022	$	51,586	$	7,629	$	—	$	59,215
2021	$	41,859	$	9,727	$	—	$	51,586
2020	$	10,486	$	31,373	$	—	$	41,859