Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Income (Loss) Before Income Taxes

Income (loss) before income taxes

	Year ended December 31,
	2014			2013			2012
	(in thousands)
U.S.	$	(46,562	)	$	(38,114	)	$	(17,849	)
Foreign		2,647			2,603			5,263
Total	$	(43,915	)	$	(35,511	)	$	(12,586	)

Income Tax Expense (Benefit)

Income taxes

	Year ended December 31,
	2014			2013			2012
	(in thousands)
Current
U.S.	$	—		$	—		$	(204	)
State		—			—			(357	)
Foreign		6			6			(163	)
Total current income tax expense (benefit)		6			6			(724	)
Deferred
U.S.		(218	)		(5,863	)		(5,536	)
State		(36	)		691			(1,049	)
Foreign		326			6			261
Total deferred income tax expense		72			(5,166	)		(6,324	)
Total income tax expense (benefit)	$	78		$	(5,160	)	$	(7,048	)

Reconciliation of Income Tax Computed at Federal Statutory Rate to Income Before Taxes

The reconciliation of income tax computed at the federal statutory rate to income before taxes is as follows:

	Year ended December 31,
	2014			2013			2012
U.S. Federal statutory rate		(34.0	)%		(34.0	)%		(34.0	)%
State taxes net of federal benefit		(5.7	)		(5.5	)		(8.9	)
Permanent differences		—			—			—
Foreign rate differential and transactional tax		(0.5	)		(0.7	)		(3.8	)
Impact of foreign tax holiday		(1.5	)		(1.8	)		(10.4	)
Valuation allowance		41.8			26.9			—
Other		0.1			0.6			1.1
		0.2	%		(14.5	)%		(56.0	)%

Significant Components of Net Deferred Income Taxes

Significant components of the Company’s net deferred income taxes are as follows at December 31:

	2014			2013
	(in thousands)
Deferred tax assets:
Allowance for doubtful accounts	$	55		$	20
Inventory reserves		918			1,340
Accrued liabilities		57			76
Warrant interest expense		269			277
Stock compensation expense		2,689			2,850
State net operating loss—net of tax		5,923			3,500
Net operating loss carryforward		31,658			16,206
Unrealized loss on securities held for sale		—			240
Tax credits		581			514
Valuation allowance		(27,151	)		(9,547	)
Total deferred tax assets		14,999			15,476
Deferred tax liability:
Depreciation		(15,423	)		(15,620	)
Unrealized gain on securities held for sale		—			—
Prepaid expenses		(169	)		(123	)
Net deferred tax liability	$	(593	)	$	(267	)

Deferred Income Tax Assets and Liabilities on Consolidated Balance Sheets

The Company’s deferred income tax assets and liabilities were reported on the consolidated balance sheets as follows.

	2014			2013
	(in thousands)
Current deferred income tax assets	$	1,267		$	—
Long term deferred income tax liabilities		(1,860	)		(267	)
Net deferred tax liability	$	(593	)	$	(267	)