Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2015
Income Tax Disclosure [Abstract]  
Components of Income (Loss) from Continuing Operations Before Income Taxes
The following table shows the components of income (loss) from continuing operations before income taxes (in thousands):

 
For the year ended December 31,
 
2015
 
2014
 
2013
 
 
 
 
 
 
United States
$
9,620

 
$
(4,246
)
 
$
(5,907
)
Income (loss) from continuing operations before income taxes
$
9,620

 
$
(4,246
)
 
$
(5,907
)
Schedule of Components of Benefits from Income Taxes
The following table shows the components of the provision for income taxes from continuing operations (in thousands):

 
For the year ended December 31,
 
2015
 
2014
 
2013
Current:
 
 
 
 
 
U.S. federal
$
123

 
$
—

 
$
—

State
26

 
—

 
—

Provision for income taxes
$
149

 
$
—

 
$
—
Schedule of Effective Income Tax Rate Reconciliation
The principal items accounting for the difference between income taxes computed at the U.S. statutory rate and the provision for income taxes from continuing operations reflected in our Consolidated Statements of Operations are as follows:
  
 
For the year ended December 31,
 
2015
 
2014
 
2013
 
 
 
 
 
 
U.S. statutory rate
34.0
 %
 
34.0
 %
 
34.0
 %
State taxes (net of federal tax benefit)
0.2

 
1.0

 
0.5

Valuation allowance
(27.9
)
 
(19.8
)
 
(31.2
)
Interest amortization expense
—

 
(22.5
)
 
(2.5
)
Other
(4.8
)
 
7.3

 
(0.8
)
 
1.5
 %
 
0.0
 %
 
0.0
 %
Schedule of Deferred Tax Assets
The tax effects of temporary differences that give rise to significant portions of the deferred tax assets are as follows (in thousands):
 
 
At December 31,
 
2015
 
2014
 
2013
 
 
 
 
 
 
Allowance for doubtful accounts
$
18

 
$
11

 
$
15

Accrued expenses and other reserves
2,244

 
2,082

 
1,960

Tax credits, deferred R&D, and other
122

 
44

 
87

Net operating loss
5,384

 
6,871

 
3,989

Valuation allowance
(7,768
)
 
(9,008
)
 
(6,051
)
Net deferred tax assets
$
—

 
$
—

 
$
—