Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of income before provision for income taxes

Income/(loss) before income taxes is as follows (in thousands):

	Year Ended December 31,
	2015			2014			2013
United States	$	(2,303	)	$	(10,317	)	$	12,570
Foreign	314			338			350
Total	$	(1,989	)	$	(9,979	)	$	12,920

Components of provision for income taxes

The components of the (benefit from)/provision for income taxes are as follows (in thousands):

	December 31,
	2015			2014			2013
Federal:
Current	$	(23	)	$	(487	)	$	1,181
Deferred	(2,053		)	(1,381		)	1,870
	(2,076		)	(1,868		)	3,051
State:
Current	768			704			1,711
Deferred	91			(1,038		)	(1,234		)
	859			(334		)	477
Foreign:
Current	258			268			412
Deferred	(187		)	(185		)	(305		)
	71			83			107
Total income tax expense (benefit):
Current	1,003			485			3,304
Deferred	(2,149		)	(2,604		)	331
	$	(1,146	)	$	(2,119	)	$	3,635

Reconciliation of actual income tax rate and statutory federal income tax rate

The Company’s actual tax expense differed from the statutory federal income tax rate, as follows:

	December 31,
	2015		2014		2013
Income tax expense at statutory rate	35.0	%	35.0	%	35.0	%
State income taxes	142.6		20.1		(4.5	)
Stock-based compensation	8.9		2.2		(15.2	)
R&D tax credit	173.5		14.8		(17.1	)
Non-deductible executive compensation	(116.5	)	(29.7	)	20.6
Valuation allowance	(170.7	)	(17.2	)	8.0
Other	(15.3	)	(4.0	)	1.3
	57.5	%	21.2	%	28.1	%

Components of net deferred tax assets

The components of the net deferred tax assets as of December 31, 2015 and 2014 are as follows (in thousands):

	December 31,
	2015			2014
Deferred tax assets:
Net operating loss carryforwards	$	3,522		$	6,672
Reserves and other tax benefits	53,157			41,549
Tax credits	13,489			7,211
Deferred tax assets	70,168			55,432
Valuation allowance	(8,161		)	(4,850		)
Net deferred tax assets	62,007			50,582
Deferred tax liabilities:
Depreciation and amortization	(72,744		)	(63,478		)
Net deferred tax liabilities	$	(10,737	)	$	(12,896	)

Reconciliation of beginning and ending amounts of unrecognized income tax benefits

A reconciliation of the beginning and ending amounts of unrecognized income tax benefits is as follows (in thousands):

	2015			2014			2013
Balance of unrecognized tax benefits at January 1	$	8,566		$	7,035		$	5,445
Additions for tax positions of prior years	—			41			22
Additions for tax positions related to current year	1,050			1,502			1,811
Reductions for tax positions of prior years	(3,913		)	(12		)	(243		)
Balance of unrecognized tax benefits at December 31	$	5,703		$	8,566		$	7,035