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INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2018

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,
	2018				2017				2016
Income (loss) before income taxes:
United States	$	(52,569	)		$	(55,932	)		$	(11,973	)
Foreign	(20,841		)		2,240				557
	$	(73,410	)		$	(53,692	)		$	(11,416	)

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,
	2018				2017				2016
Provision (benefit) for income taxes:
Current:
Federal	$	561			$	(200	)		$	12
State	128				115				24
Foreign	2,198				1,960				1,378
Total current	2,887				1,875				1,414
Deferred:
Federal	(8,481		)		49,570				(301		)
State	(1,414		)		(4,833		)		(1,007		)
Foreign	(1,477		)		(816		)		338
Change in valuation allowance	11,885				(64,236		)		2,072
Total deferred	513				(20,315		)		1,102
Total	$	3,400			$	(18,440	)		$	2,516

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,
	2018			2017			2016
U.S. statutory income tax rate	21.0	%		35.0	%		35.0	%
State income taxes, net of federal benefit	(0.1	)		1.2			—
Foreign income taxes	(5.7	)		(0.5	)		(7.9	)
Foreign tax audit	—			—			(5.2	)
Acquisition costs	(0.3	)		(6.0	)		—
Foreign deemed dividends	(3.4	)		(3.8	)		(5.0	)
Stock-based compensation	(0.3	)		26.8			(38.9	)
Tax credits	0.6			(33.3	)		11.6
Uncertain tax positions	1.3			(1.2	)		—
NOL and credit limitations	—			(18.9	)		—
Valuation allowance	(16.1	)		29.0			(1.9	)
Goodwill amortization	0.3			(1.7	)		(6.7	)
Meals and entertainment	(0.4	)		(0.5	)		(1.4	)
Tax reform	—			8.8			—
Other, net	(1.5	)		(0.6	)		(1.6	)
Effective income tax rate	(4.6	)%		34.3	%		(22.0	)%

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,
	2018				2017
Assets:
Net operating loss carryforwards	$	76,278			$	58,624
Research and development tax credits	28,664				24,499
Deferred revenue	5,755				5,886
Accrued expenses	9,601				10,786
Inventory	4,906				5,980
Stock-based compensation	1,536				727
Fixed assets	7,716				7,452
Other temporary differences	1,943				1,556
	136,399				115,510
Valuation allowance	(101,484		)		(89,600		)
Total deferred tax assets	34,915				25,910
Liabilities:
Purchased intangible assets	(26,014		)		(17,092		)
Unremitted foreign income	(4,487		)		(3,171		)
Total deferred tax liabilities	(30,501		)		(20,263		)
Total net deferred tax assets	$	4,414			$	5,647
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	$	9,152			$	8,434
Deferred income taxes - noncurrent liabilities	(4,738		)		(2,787		)
	$	4,414			$	5,647

Schedule of Unrecognized Tax Benefits

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

	2018				2017				2016
Unrecognized tax benefits at January 1	$	4,528			$	8,969			$	8,888
Increases related to current year tax positions	74				139				36
Increases related to prior period tax positions	122				430				723
Increases related to business acquisitions	—				2,012				—
Decreases related to prior period tax positions	(1,263		)		(7,022		)		(81		)
Settlements	—				—				(597		)
Unrecognized tax benefits at December 31	$	3,461			$	4,528			$	8,969

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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 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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