Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The components of income tax expense are as follows:



	Year Ended December 31,
	2011			2012			2013
Current:
Federal	$	1,737		$	3,164		$	(1,790	)
State	318			312			(122		)
Foreign	2,131			2,880			1,497
	4,186			6,356			(415		)
Deferred:
Federal	(8,038		)	(18,003		)	(2,378		)
State	(818		)	(2,799		)	938
Foreign	(162		)	(12		)	(70		)
	(9,018		)	(20,814		)	(1,510		)
Total income tax benefit	$	(4,832	)	$	(14,458	)	$	(1,925	)

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

The income (loss) before tax are comprised of the following:



	Year Ended December 31,
	2011			2012		2013
Domestic operations	$	23,963		$	13,278	$	(4,860	)
Foreign operations	$	(3,569	)	$	16,129	$	6,393

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

Deferred tax assets and liabilities are comprised of the following:



	December 31,
	2012			2013
Research and development credit carryforward	$	3,506		$	5,233
Reserves and accruals not currently deductible	4,444			3,085
Deferred revenue	3,191			2,379
Domestic net operating loss carryforwards	2,351			1,900
Capital losses	31			29
Foreign net operating loss and credit carryforwards	2,145			6,327
Intangibles	12,610			11,506
Tax deductible transaction costs	429			347
Share-based compensation	2,086			1,730
Inventory obsolescence reserve	3,517			3,935
Depreciation	—			356
Other	1,946			223
Gross deferred tax assets	36,256			37,050
Valuation allowance for deferred tax assets	(1,361		)	(1,646		)
Deferred tax assets after valuation allowance	34,895			35,404
Gross deferred tax liabilities	(611		)	(1,072		)
Net deferred tax assets	$	34,284		$	34,332

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The provision for income taxes differs from the amount of income tax determined by applying the applicable U.S. federal income tax rate of 35% for the years ended December 31, 2011, 2012 and 2013 to income before provision for income taxes as follows:



	Year Ended December 31,
	2011			2012			2013
Federal income tax provision at statutory rate	$	7,138		$	10,292		$	537
State taxes, net of federal effect	207			(698		)	828
Foreign taxes net of federal effect	1,136			1,296			(1,514		)
Domestic manufacturing benefit	(536		)	(915		)	—
Change in valuation allowance for deferred tax assets	(12,358		)	(23,313		)	(153		)
Research tax credit	(875		)	—			(1,965		)
Deferred tax true-up	—			—			401
Other	456			(1,120		)	(59		)
Provision (benefit) for income taxes	$	(4,832	)	$	(14,458	)	$	(1,925	)
Effective tax rate	(24		)%	(49		)%	(126		)%

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

The total amount of unrecognized tax benefits were as follows:



	December 31,
	2011		2012			2013
Unrecognized tax benefits, opening balance	$	6,724	$	8,476		$	9,566
Gross increases—tax positions in prior period	1,358		486			533
Gross decreases - tax positions in prior period	—		(494		)	(4,992		)
Gross increases—current-period tax positions	394		1,098			599
Lapse of statute of limitations	—		—			—
Unrecognized tax benefits, ending balance	$	8,476	$	9,566		$	5,706