Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Taxes [Abstract]

Income (loss) before income taxes

	Year ended December 31,
	2012			2011		2010
	(in thousands)
U.S.	$	(17,849	)	$	51,618	$	28,799
Foreign		5,263			3,015		241
Total	$	(12,586	)	$	54,633	$	29,040

Income tax expense (benefit)

	Year ended December 31,
	2012			2011		2010
	(in thousands)
Current
U.S.	$	(204	)	$	177	$	(79	)
State		(357	)		2,777		—
Foreign		(163	)		173		8
Total current income tax expense (benefit)		(724	)		3,127		(71	)
Deferred
U.S.		(5,536	)		13,223		—
State		(1,049	)		224		—
Foreign		261			—		—
Total deferred income tax expense		(6,324	)		13,447		—
Total income tax expense (benefit)	$	(7,048	)	$	16,574	$	(71	)

Reconciliation of income tax computed at federal statutory rate to income before taxes

	Year ended December 31,
	2012			2011			2010
U.S. Federal statutory rate		(34.0	)%		35.0	%		34.0	%
State taxes net of federal benefit		(8.9	)		5.2			5.3
Permanent differences		—			(0.6	)		0.3
Foreign rate differential and transactional tax		(3.8	)		(1.4	)		3.2
Impact of foreign tax holiday		(10.4	)		—			—
Valuation allowance		—			(5.9	)		(41.4	)
Other		1.1			(2.0	)		(1.6	)
		(56.0	)%		30.3	%		(0.2	)%

Significant components of net deferred income taxes

	2012			2011
	(in thousands)
Deferred tax assets:
Allowance for doubtful accounts	$	115		$	156
Inventory reserves		1,697			400
Accrued liabilities		316			260
Warrant interest expense		277			283
Charitable contributions		—			10
Stock compensation expense		2,503			2,083
State net operating loss—net of tax		1,524			984
Net operating loss carryforward		4,537			—
Tax credits		297			206
Total deferred tax assets		11,266			4,382
Deferred tax liability:
Depreciation		(16,685	)		(16,310	)
Unrealized gain on securities held for sale		(340	)		—
Prepaid expenses		(140	)		(115	)
Net deferred tax liability	$	(5,899	)	$	(12,043	)

Deferred income tax assets and liabilities on consolidated balance sheets

	2012			2011
	(in thousands)
Current deferred income tax assets	$	4,427		$	3,078
Long term deferred income tax liabilities		(10,326	)		(15,121	)
Net deferred tax liability	$	(5,899	)	$	(12,043	)

Reconciliation of the unrecognized tax benefits taken or expected to be taken in a tax return that have been recorded on the Company's financial statements

	(in thousands)
Balance at December 31, 2010	$	—
Tax positions related to current year		159
Tax positions related to prior year		204
Balance at December 31, 2011		363
Decrease related to prior year		(363	)
Tax positions related to current year		1,140
	$	1,140