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Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2014
Income Tax Disclosure [Abstract]  
Components of (Benefit) Provision for Income Taxes
Significant components of the (benefit) provision for income taxes are as follows (in thousands):
 
December 31,
 
2014
 
2013
 
2012
Current:
 
 
 
 
 
Federal
$
61

 
$
(565
)
 
$
1,870

State
(1,294
)
 
810

 
377

Foreign
69

 
18

 
—

Total current provision
(1,164
)
 
263

 
2,247

Deferred:
 
 
 
 
 
Federal
(5,267
)
 
(2,584
)
 
811

State
2,488

 
(1,635
)
 
(440
)
Foreign
34

 
—

 
—

Total deferred (benefit) provision
(2,745
)
 
(4,219
)
 
371

(Benefit) provision for income taxes
$
(3,909
)
 
$
(3,956
)
 
$
2,618
Schedule of Income before (Benefit) Provision for Income Taxes
The Company’s (loss) income before (benefit) provision for income taxes was subject to taxes in the following jurisdictions for the following periods (in thousands):
 
December 31,
 
2014
 
2013
 
2012
United States
$
(11,328
)
 
$
3,364

 
$
7,611

Foreign
345

 
70

 
—

 
$
(10,983
)
 
$
3,434

 
$
7,611
Schedule of Deferred Tax Assets and Liabilities
Significant components of the Company’s deferred tax assets as of December 31, 2014 and 2013 are shown below (in thousands).
 
December 31,
 
2014
 
2013
Deferred tax assets:
 
 
 
Net operating loss carryforwards
$
2,236

 
$
1,486

Intangible assets
3,366

 
2,936

Sale-leaseback, net
1,424

 
1,602

Allowance for returns and discounts
4,574

 
3,155

Stock compensation
8,255

 
8,192

Tax credit carryforwards
2,060

 
1,351

Other, net
4,472

 
4,764

Total deferred tax assets
26,387

 
23,486

Valuation allowance for deferred tax assets
(2,331
)
 
—

Total deferred tax assets, net of valuation allowance
24,056

 
23,486

Deferred tax liabilities:
 
 
 
Convertible senior notes
(11,267
)
 
—

Intangible assets
(12,939
)
 
(16,494
)
Property, plant and equipment
(6,424
)
 
(4,948
)
Total deferred tax liabilities
(30,630
)
 
(21,442
)
Net deferred tax assets and liabilities
$
(6,574
)
 
$
2,044
Reconciliation of Income Tax Computed at Federal Statutory Rate
The reconciliation of income tax computed at the federal statutory rate to the (benefit) provision for income taxes from continuing operations is as follows (in thousands):
 
Year ended December 31,
 
2014
 
2013
 
2012
Tax (benefit) expense at statutory tax rate
(3,844
)
 
1,214

 
2,664

State (benefit) taxes, net of federal tax (benefit)
(151
)
 
63

 
239

Permanent differences
70

 
(76
)
 
26

Federal and state research credits—current year
(765
)
 
(1,046
)
 
(370
)
Federal research credits - prior year
—

 
(527
)
 
—

(Release) accrual of uncertain tax positions
(21
)
 
369

 
(106
)
Expiration of statutes for uncertain tax positions
(953
)
 
(3,452
)
 
—

Foreign effective tax rate differential
(18
)
 
(6
)
 
—

Impact of change in federal and state tax rate on revaluing deferred tax assets
110

 
(581
)
 
75

Change in valuation allowance
2,331

 
—

 
—

Acquisition related adjustments
(485
)
 
—

 
—

Other
(183
)
 
86

 
90

 
(3,909
)
 
(3,956
)
 
2,618
Summary of Unrecognized Tax Benefits
The following table summarizes the activity related to the Company’s for unrecognized tax benefits (in thousands):
 
Year ended December 31,
 
2014
 
2013
 
2012
Beginning balance
$
7,765

 
$
9,051

 
$
8,567

(Decreases) increases related to prior year tax positions
(68
)
 
773

 
372

Increases related to current year tax positions
642

 
1,019

 
366

Decreases due to settlements
(42
)
 
—

 
—

Expiration of the statute of limitations for the assessment of taxes
(1,232
)
 
(3,078
)
 
(254
)
Ending balance
$
7,065

 
$
7,765

 
$
9,051