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INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of Income (Loss) Before Taxes

The components of loss from continuing operations before income taxes consisted of the following (in thousands):

	Year ended December 31,
	2019				2018				2017
Income (loss) before income taxes:
United States	$	(132,887	)		$	(52,569	)		$	(55,932	)
Foreign	9,994				(20,841		)		2,240
	$	(122,893	)		$	(73,410	)		$	(53,692	)

Schedule of Income Tax Expense (Benefit)

The provision (benefit) for income taxes from continuing operations consisted of the following (in thousands):

	Year ended December 31,
	2019				2018				2017
Provision (benefit) for income taxes:
Current:
Federal	$	11			$	561			$	(200	)
State	128				128				115
Foreign	1,744				2,198				1,960
Total current	1,883				2,887				1,875
Deferred:
Federal	9,790				(8,481		)		49,570
State	1,630				(1,414		)		(4,833		)
Foreign	383				(1,477		)		(816		)
Change in valuation allowance	(6,504		)		11,885				(64,236		)
Total deferred	5,299				513				(20,315		)
Total	$	7,182			$	3,400			$	(18,440	)

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the Company's effective tax rate for continuing operations to the statutory federal rate is as follows:

	Year ended December 31,
	2019			2018			2017
U.S. statutory income tax rate	21.0	%		21.0	%		35.0	%
State income taxes, net of federal benefit	(0.2	)		(0.1	)		1.2
Foreign income taxes	(1.0	)		(5.7	)		(0.5	)
Acquisition costs	(0.5	)		(0.3	)		(6.0	)
Foreign deemed dividends	(0.4	)		(3.4	)		(3.8	)
Stock-based compensation	(0.7	)		(0.3	)		26.8
Tax credits	2.8			0.6			(33.3	)
Uncertain tax positions	(0.2	)		1.3			(1.2	)
NOL and credit limitations	—			—			(18.9	)
Valuation allowance	(0.7	)		(16.1	)		29.0
Goodwill amortization	0.4			0.3			(1.7	)
Meals and entertainment	(0.3	)		(0.4	)		(0.5	)
Tax reform	(0.1	)		—			8.8
Goodwill impairment	(25.4	)		—			—
Other, net	(0.5	)		(1.5	)		(0.6	)
Effective income tax rate	(5.8	)%		(4.6	)%		34.3	%

Summary of Deferred Tax Assets and Liabilities

The following is a summary of the significant components of deferred income tax assets and liabilities (in thousands):

	December 31,
	2019				2018
Assets:
Net operating loss carryforwards	$	61,057			$	76,278
Research and development tax credits	32,879				28,664
Deferred revenue	7,868				5,755
Accrued expenses	5,687				9,601
Inventory	4,618				4,906
Stock-based compensation	2,880				1,536
Fixed assets	5,461				7,716
Other temporary differences	2,138				1,943
	122,588				136,399
Valuation allowance	(94,980		)		(101,484		)
Total deferred tax assets	27,608				34,915
Liabilities:
Purchased intangible assets	(22,470		)		(26,014		)
Unremitted foreign income	(4,827		)		(4,487		)
Total deferred tax liabilities	(27,297		)		(30,501		)
Total net deferred tax assets	$	311			$	4,414
The deferred tax assets and liabilities based on tax jurisdictions are presented in the Company's consolidated balance sheets as follows:
Deferred income taxes - noncurrent assets	$	4,959			$	9,152
Deferred income taxes - noncurrent liabilities	(4,648		)		(4,738		)
	$	311			$	4,414

Schedule of Unrecognized Tax Benefits

A reconciliation of the Company's unrecognized tax benefits is as follows (in thousands):

	2019				2018				2017
Unrecognized tax benefits at January 1	$	3,461			$	4,528			$	8,969
Increases related to current year tax positions	292				74				139
Increases related to prior period tax positions	—				122				430
Increases related to business acquisitions	—				—				2,012
Decreases related to prior period tax positions	(821		)		(1,263		)		(7,022		)
Settlements	—				—				—
Unrecognized tax benefits at December 31	$	2,932			$	3,461			$	4,528

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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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