Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Summary of Loss before Income Taxes

oss before income taxes for the years ended December 31, 2015, 2014 and 2013 is comprised of the following (in thousands):

	Year Ended December 31,
	2015			2014			2013
Domestic	$	(48,965	)	$	(39,513	)	$	(44,142	)
Foreign	(3,148		)	408			812
Loss before income taxes	$	(52,113	)	$	(39,105	)	$	(43,330	)

Summary of Provision for Income Taxes

The provision for income taxes for the years ended December 31, 2015, 2014 and 2013 is comprised of the following (in thousands):

	Year Ended December 31,
	2015			2014		2013
Current:
Federal	$	—		$	—	$	(248	)
State	(6		)	21		33
Foreign	81			16		(229		)
Total Current	75			37		(444		)
Deferred:
Federal	—			—		53
State	—			—		—
Foreign	106			87		474
Total Deferred	106			87		527
Provision for income taxes	$	181		$	124	$	83

Summary of Net Deferred Tax Assets

The Company’s net deferred tax liabilities consist of the following (in thousands):

	December 31,
	2015			2014
Deferred tax assets:
Accrued expenses	$	3,134		$	4,566
Inventory obsolescence provision	1,576			2,352
Depreciation and amortization	5,613			4,137
Deferred rent	321			555
Net operating loss and tax credit carryforwards	96,848			76,346
Stock-based compensation	1,685			1,910
Unrecognized tax benefits	1,407			1,296
Deferred tax assets	110,584			91,162
Deferred tax liabilities:
Convertible Notes	(12,207		)	—
Acquired intangible assets	(6,868		)	(388		)
Deferred tax liabilities	(19,075		)	(388		)
Valuation allowance	(94,984		)	(90,774		)
Net deferred tax liabilities	$	(3,475	)	$	—

Summary of Provision for Income Taxes Reconciles to Amount Computed by Applying Statutory Federal Income Tax Rate

The provision for income taxes reconciles to the amount computed by applying the statutory federal income tax rate of 34% in 2015, 2014 and 2013 to loss before income taxes as follows (in thousands):

	Year Ended December 31,
	2015			2014			2013
Federal tax benefit, at statutory rate	$	(17,718	)	$	(13,447	)	$	(14,732	)
State benefit, net of federal benefit	(280		)	(1,054		)	(922		)
Foreign tax rate difference	222			—			—
Change in valuation allowance	15,389			11,316			15,577
Change in fair value of warrant	—			1,203			—
Beneficial conversion feature	—			163			—
Research and development credits	(796		)	3			(1,084		)
Share-based compensation	752			2,402			2,433
Uncertain tax positions	—			(62		)	(307		)
Change in state apportionment	2,561			(347		)	(767		)
Other	51			(53		)	(115		)
Provision for income taxes	$	181		$	124		$	83

Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits

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

Balance at December 31, 2012	$	33,220
Increases related to current and prior year tax positions	2,653
Settlements and lapses in statutes of limitations	(373		)
Balance at December 31, 2013	35,500
Increases related to current and prior year tax positions	204
Settlements and lapses in statutes of limitations	(61		)
Balance at December 31, 2014	35,643
Increases related to current and prior year tax positions	160
Balance at December 31, 2015	$	35,803