INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2017

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,
	2017			2016			2015
Income (loss) before income taxes:
United States	$	(55,932	)	$	(11,973	)	$	(29,595	)
Foreign	2,240			557			(293		)
	$	(53,692	)	$	(11,416	)	$	(29,888	)

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,
	2017			2016			2015
Provision (benefit) for income taxes:
Current:
Federal	$	(200	)	$	12		$	60
State	115			24			150
Foreign	1,960			1,378			982
Total current	1,875			1,414			1,192
Deferred:
Federal	49,570			(301		)	(7,069		)
State	(4,833		)	(1,007		)	4,962
Foreign	(816		)	338			155
Change in valuation allowance	(64,236		)	2,072			2,767
Total deferred	(20,315		)	1,102			815
Total	$	(18,440	)	$	2,516		$	2,007

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,
	2017		2016		2015
U.S. statutory income tax rate	(35.0	)%	(35.0	)%	(35.0	)%
State income taxes, net of federal benefit	(1.2	)	—		—
Foreign income taxes	0.5		7.9		3.6
Foreign tax audit	—		5.2		—
Acquisition costs	6.0		—		—
Foreign deemed dividends	3.8		5.0		1.7
Stock-based compensation	(26.8	)	38.9		14.4
Tax credits	33.3		(11.6	)	(3.3	)
Uncertain tax positions	1.2		—		—
NOL and credit limitations	18.9		—		—
Valuation allowance	(29.0	)	1.9		24.3
Goodwill amortization	1.7		6.7		2.2
Meals and entertainment	0.5		1.4		0.8
Tax reform	(8.8	)	—		—
Other, net	0.6		1.6		(2.0	)
Effective income tax rate	(34.3	)%	22.0	%	6.7	%

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,
	2017			2016
Assets:
Net operating loss carryforwards	$	58,624		$	77,425
Research and development tax credits	24,499			24,440
Other tax credits	—			230
Intangible assets	—			9,270
Deferred revenue	5,886			3,176
Accrued expenses	10,786			6,699
Inventory	5,980			5,010
Stock-based compensation	7,452			14,295
Fixed assets	727			2,879
Other temporary differences	1,556			13
	115,510			143,437
Valuation allowance	(89,600		)	(141,895		)
Total deferred tax assets	25,910			1,542
Liabilities:
Purchased intangible assets	(17,092		)	(3,047		)
Unremitted foreign income	(3,171		)	—
Total deferred tax liabilities	(20,263		)	(3,047		)
Total net deferred tax assets	$	5,647		$	(1,505	)
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	$	8,434		$	1,542
Deferred income taxes - noncurrent liabilities	(2,787		)	(3,047		)
	$	5,647		$	(1,505	)

Schedule of Unrecognized Tax Benefits

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

	2017			2016			2015
Unrecognized tax benefits at January 1	$	8,969		$	8,888		$	8,875
Increases related to current year tax positions	139			36			13
Increases related to prior period tax positions	430			723			—
Increases related to business acquisitions	2,012			—			—
Decreases related to prior period tax positions	(7,022		)	(81		)	—
Settlements	—			(597		)	—
Unrecognized tax benefits at December 31	$	4,528		$	8,969		$	8,888