Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

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

The components of income tax expense (benefit) are as follows:



	Year Ended December 31,
	2016		2015		2014
Current:
Federal	$	6,084	$	1,012	$	(124	)
State	983		439		198
Foreign	838		3,425		1,812
	7,905		4,876		1,886
Deferred:
Federal	4,765		3,881		(4,285		)
State	184		71		54
Foreign	62		28		294
	5,011		3,980		(3,937		)
Total income tax expense (benefit)	$	12,916	$	8,856	$	(2,051	)

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,
	2016		2015		2014
Domestic operations	$	47,599	$	10,596	$	(11,985	)
Foreign operations	$	2,269	$	16,216	$	5,294

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, 2016, 2015 and 2014 to income before provision for income taxes as follows:



	Year Ended December 31,
	2016			2015			2014
Federal income tax provision at statutory rate	$	17,454		$	9,384		$	(2,342	)
State taxes, net of federal effect	822			370			21
Foreign taxes net of federal effect	(1,613		)	754			561
Domestic manufacturing benefit	(1,244		)	(553		)	—
Change in valuation allowance for deferred tax assets	—			(653		)	535
Research tax credit	(692		)	(694		)	(830		)
Deferred tax true-up	(1,644		)	(23		)	(36		)
Other	(167		)	271			40
Provision (benefit) for income taxes	$	12,916		$	8,856		$	(2,051	)
Effective tax rate	26		%	33		%	31		%

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

Deferred tax assets and liabilities are comprised of the following:



	December 31,
	2016			2015
Research and development credit carryforward	$	3,784		$	6,647
Reserves and accruals not currently deductible	2,932			3,357
Deferred revenue	2,286			1,988
Domestic net operating loss carryforwards	1,049			1,302
Foreign net operating loss and credit carryforwards	4,362			4,347
Intangibles	11,002			11,614
Tax deductible transaction costs	199			260
Share-based compensation	2,249			3,396
Inventory obsolescence reserve	4,454			4,026
Depreciation	206			484
Other	633			87
Gross deferred tax assets	33,156			37,508
Valuation allowance for deferred tax assets	(1,924		)	(2,205		)
Deferred tax assets after valuation allowance	31,232			35,303
Gross deferred tax liabilities	(382		)	(330		)
Net deferred tax assets	$	30,850		$	34,973

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

The total amount of unrecognized tax benefits were as follows:



	December 31,
	2016			2015			2014
Unrecognized tax benefits, opening balance	$	5,236		$	5,292		$	5,706
Gross increases—tax positions in prior period	118			136			150
Gross decreases—tax positions in prior period	(735		)	(755		)	(892		)
Gross increases—current-period tax positions	208			563			328
Lapse of statute of limitations	—			—			—
Unrecognized tax benefits, ending balance	$	4,827		$	5,236		$	5,292