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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Summary of Loss before Income Taxes

Loss before income taxes for the years ended December 31, 2016, 2015 and 2014 is comprised of the following (in thousands):

	Year Ended December 31,
	2016				2015				2014
Domestic	$	(51,265	)		$	(48,965	)		$	(39,513	)
Foreign	(8,922		)		(3,148		)		408
Loss before income taxes	$	(60,187	)		$	(52,113	)		$	(39,105	)

Summary of Provision for Income Taxes

The provision for income taxes for the years ended December 31, 2016, 2015 and 2014 is comprised of the following (in thousands):

	Year Ended December 31,
	2016				2015				2014
Current:
Federal	$	—			$	—			$	—
State	—				(6		)		21
Foreign	185				81				16
Total current	185				75				37
Deferred:
Federal	156				—				—
State	—				—				—
Foreign	40				106				87
Total deferred	196				106				87
Provision for income taxes	$	381			$	181			$	124

Summary of Net Deferred Tax Assets

The Company’s net deferred tax liabilities consist of the following (in thousands):

	December 31,
	2016				2015
Deferred tax assets:
Accrued expenses	$	2,881			$	3,455
Provision for excess and obsolete inventory	4,913				1,576
Depreciation and amortization	9,655				5,613
Net operating loss and tax credit carryforwards	105,143				96,848
Share-based compensation	2,203				1,685
Unrecognized tax benefits	1,510				1,407
Deferred tax assets	126,305				110,584
Deferred tax liabilities:
Convertible senior notes	(9,535		)		(12,207		)
Purchased intangible assets	(6,790		)		(6,868		)
Deferred tax liabilities	(16,325		)		(19,075		)
Valuation allowance	(114,419		)		(94,984		)
Net deferred tax liabilities	$	(4,439	)		$	(3,475	)

Summary of Provision for Income Taxes Reconciles to Amount Computed by Applying Statutory Federal Income Tax Rate

The provision for income taxes reconciles to the amount computed by applying the statutory federal income tax rate of 34% in 2016, 2015 and 2014 to loss before income taxes as follows (in thousands):

	Year Ended December 31,
	2016				2015				2014
Federal tax benefit, at statutory rate	$	(20,463	)		$	(17,718	)		$	(13,447	)
State benefit, net of federal benefit	(293		)		(280		)		(1,054		)
Foreign tax rate difference	681				222				—
Change in valuation allowance	19,341				15,389				11,316
Change in fair value of warrant liability	—				—				1,203
Beneficial conversion feature	—				—				163
Research and development credits	(1,010		)		(796		)		3
Share-based compensation	418				752				2,402
Uncertain tax positions	—				—				(62		)
Change in state apportionment	—				2,561				(347		)
Other	1,707				51				(53		)
Provision for income taxes	$	381			$	181			$	124

Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits

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

Balance at December 31, 2013	$	35,500
Increases related to current and prior year tax positions	204
Settlements and lapses in statutes of limitations	(61		)
Balance at December 31, 2014	35,643
Increases related to current and prior year tax positions	160
Balance at December 31, 2015	35,803
Increases related to current and prior year tax positions	488
Balance at December 31, 2016	$	36,291

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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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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-Paragraph 12
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Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
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Tabular disclosure of the change in unrecognized tax benefits.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 55
-Paragraph 217
-URI http://asc.fasb.org/extlink&oid=75116239&loc=d3e36027-109320

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