Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Reconciliation of Total Amounts of Unrecognized Tax Benefits

The following is a reconciliation of the total amounts of unrecognized tax benefits for the years ended December 31, 2017, 2016 and 2015:

In thousands	2017			2016		2015
Beginning uncertain tax benefits	$	1,633		$	1,550	$	2,487
Prior year—increases		—			—		120
Prior year—decreases		(20	)		—		(762	)
Current year—increases		121			83		144
Current year—decreases for lapses in statutes of limitations		—			—		(439	)
Ending uncertain tax benefits	$	1,734		$	1,633	$	1,550

Jurisdictions the Company Remains Subject to Tax Examinations

The Company files income tax returns in the United States, Ireland and United Kingdom, or UK. The Company remains subject to tax examinations in the following jurisdictions as of December 31, 2017:

Jurisdiction	Tax Years
United States—Federal	2013-2017
United States—State	2012-2017
Ireland	2013-2017
United Kingdom	2016-2017

Components of Loss from Operations Before Taxes

The components of loss from operations before taxes were as follows for the years ended December 31, 2017, 2016 and 2015:

In thousands	2017			2016			2015
United States	$	(2,075	)	$	(8,115	)	$	(10,137	)
Ireland and United Kingdom		(52,743	)		(68,266	)		(108,153	)
	$	(54,818	)	$	(76,381	)	$	(118,290	)

Benefit from Income Taxes

The (provision for) benefit from income taxes shown in the accompanying consolidated statements of operations consists of the following for fiscal 2017, 2016 and 2015:

In thousands	2017			2016			2015
Current:
United States—Federal	$	1,769		$	1,033		$	1,053
United States—State		196			138			113
Total current	$	1,965		$	1,171		$	1,166
Deferred:
United States—Federal		5,760			(4,001	)		(3,343	)
United States—State		(487	)		(334	)		(605	)
Ireland and United Kingdom		(16,306	)		(143	)		(9,023	)
Change in valuation allowance		22,115			13,276			8,719
Total deferred	$	11,082		$	8,798		$	(4,252	)
Provision for (benefit from) income taxes	$	13,047		$	9,969		$	(3,086	)

Difference between Benefit from Income Taxes and Amount Computed by Applying Statutory Income Tax Rate to Income Before Taxes

The (provision for) benefit from income taxes differs from the amount computed by applying the statutory income tax rate to income before taxes due to the following for fiscal 2017, 2016 and 2015:

In thousands	2017			2016			2015
Benefits from taxes at statutory rate	$	(13,698	)	$	(19,039	)	$	(29,572	)
Rate differential		3,071			4,667			8,572
Change in valuation reserves		22,115			13,276			8,719
Derivative liabilities		—			(668	)		187
Gain on extinguishment of debt		—			—			(328	)
Nondeductible employee compensation		1,668			1,164			808
Stock option/RSU windfall		(1,182	)		—			—
Research and development credits		(1,177	)		(1,689	)		(1,284	)
Tax return to provision adjustments		5,788			4,524			2,248
U.S. rate change—tax reform		7,398			—			—
Cumulative translation adjustment		(12,554	)		7,385			7,811
Permanent and other		1,635			(1,573	)		(1,841	)
Non-deductible interest expense		(17	)		1,922			1,594
Provision for (benefit from) income taxes	$	13,047		$	9,969		$	(3,086	)

Income Tax Effect of Each Type of Temporary Difference Comprising Net Deferred Tax Asset

The income tax effect of each type of temporary difference comprising the net deferred tax asset as of December 31, 2017 and 2016 is as follows:

In thousands	December 31, 2017			December 31, 2016
Deferred tax assets:
Net operating losses	$	110,715		$	95,181
Stock-based compensation		12,446			16,894
Tax credits		6,378			6,893
Other reserves and accrued liabilities		3,587			3,193
Gross deferred tax assets		133,126			122,161
Less: valuation allowance		(131,389	)		(109,274	)
Total deferred tax assets		1,737			12,887
Deferred tax liabilities:
Depreciation and amortization		(1,145	)		(1,050	)
Other liabilities		(592	)		(755	)
Total deferred tax liabilities		(1,737	)		(1,805	)
Net deferred tax assets	$	—		$	11,082

Valuation Allowance

The following table reflects the activity in the valuation allowance for the years ended December 31, 2017 and 2016:

In thousands	2017		2016
Beginning valuation allowance	$	109,274	$	95,999
Increase as reflected in income tax expense		11,466		17,951
Cumulative translation adjustment		10,649		(4,676	)
Ending valuation allowance	$	131,389	$	109,274