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Income Taxes (Tables)
 9 Months Ended
Sep. 30, 2016
Income Tax Disclosure [Abstract]  
Summary of the provision for (benefit from) income taxes
The components of the provision for income taxes are shown below for the periods presented (in thousands):

 
Three months ended
September 30,
 
Nine months ended
September 30,
 
2016
 
2015
 
2016
 
2015
Current:
 
 
 
 
 
 
 
U.S. federal
$
1

 
$
(586
)
 
$
1

 
$
227

State
10

 
(65
)
 
21

 
45

Provision for (benefit from) income taxes
$
11

 
$
(651
)
 
$
22

 
$
272