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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2015
Income Tax Disclosure [Abstract]  
Company’s loss from operations before income tax expense by jurisdiction
The Company’s loss from operations before income tax expense by jurisdiction are as follows (in thousands):
 
 
 
2015
 
2014
 
2013
 
Domestic
 
$
(150,227)
 
$
(76,742)
 
$
(48,691)
 
Foreign
 
 
(6,710)
 
 
(6,205)
 
 
(3,292)
 
Total net loss
 
$
(156,937)
 
$
(82,947)
 
$
(51,983)
 
Components of The Income Tax Provision (Benefit)
The components of the income tax provision are as follows (in thousands):
 
 
 
2015
 
2014
 
2013
 
Current U.S.
 
$
 
$
 
$
 
Current foreign
 
 
 
 
 
 
25
 
Deferred
 
 
 
 
 
 
 
Net provision
 
$
 
$
 
$
25
 
Deferred Tax Assets (Liabilities)
Deferred tax assets (liabilities) consist of the following at December 31 (in thousands):
 
 
 
2015
 
2014
 
Net operating losses U.S.
 
$
203,284
 
$
148,451
 
Net operating losses foreign
 
 
8,360
 
 
6,535
 
Research tax credits
 
 
16,491
 
 
11,068
 
Other
 
 
12,903
 
 
9,963
 
Total deferred tax assets
 
 
241,038
 
 
176,017
 
Intangibles
 
 
(2,415)
 
 
(2,773)
 
Other
 
 
(1,767)
 
 
(321)
 
Total deferred tax liabilities
 
 
(4,182)
 
 
(3,094)
 
Net deferred tax assets
 
 
236,856
 
 
172,923
 
Less valuation allowance
 
 
(236,856)
 
 
(172,923)
 
Deferred tax assets, net
 
$
 
$
 
Tax Rate Differences
The differences between the U.S. federal statutory tax rate and the Company’s effective tax rate are as follows:
 
 
 
2015
 
2014
 
2013
 
Statutory federal tax rate
 
 
(34)
%
 
(34)
%
 
(34)
%
State income taxes, net of federal benefit
 
 
(3)
%
 
(3)
%
 
(3)
%
Research and development and other tax credits
 
 
(3)
%
 
(2)
%
 
(7)
%
Expiration of net operating losses
 
 
0
%
 
0
%
 
0
%
Release of FIN 48 liability
 
 
(2)
%
 
0
%
 
0
%
Other
 
 
1
%
 
2
%
 
3
%
Change in valuation allowance
 
 
41
%
 
37
%
 
41
%
 
 
 
0
%
 
0
%
 
0
%
Tax Return Reported Federal Net Operating Losses and Tax Credits Available
As of December 31, 2015, the Company had tax return reported federal net operating losses and tax credits available as follows (in thousands):
 
 
 
Amount
 
Federal net operating losses expiring through the year 2035
 
$
551,433
 
Foreign net operating losses (no expiration)
 
 
38,001
 
Research tax credits expiring through the year 2035
 
 
16,397
 
Alternative-minimum tax credit (no expiration)
 
 
94
 
Reconciliation of Unrecognized Tax Benefits
Tabular Reconciliation of Unrecognized Tax Benefits (in thousands):
 
 
 
Amount
 
Unrecognized tax benefits as of January 1, 2014
 
$
4,801
 
Gross increases — tax positions in prior period
 
 
 
Gross decreases — tax positions in prior period
 
 
 
Gross increases — current-period tax positions
 
 
 
Increases (decreases) from settlements
 
 
 
Unrecognized tax benefits as of December 31, 2014
 
$
4,801
 
Gross increases — tax positions in prior period
 
 
 
Gross decreases — tax positions in prior period
 
 
4,587
 
Gross increases — current-period tax positions
 
 
 
Increases (decreases) from settlements
 
 
 
Unrecognized tax benefits as of December 31, 2015
 
$
214