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Note 15 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

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

		Year Ended December 31,
(in thousands)		2017				2016				2015
Domestic		$	69,929			$	59,232			$	59,421
Foreign			4,506				4,989				8,440
Total		$	74,435			$	64,221			$	67,861

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

		Year Ended December 31,
(in thousands)		2017				2016				2015
Current:
Federal		$	17,808			$	15,119			$	15,845
State			1,367				1,091				1,074
Foreign			2,215				2,439				1,591
Deferred
Federal			865				2,758				2,798
State			193				75				(38	)
Foreign			(1,918	)			(1,960	)			294
Valuation Allowance			2,127				1,992				(217	)
Total		$	22,657			$	21,514			$	21,347

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

		Year Ended December 31,
		2017				2016				2015
Federal tax statutory rate			35.0	%			35.0	%			35.0	%
State tax (net of federal benefit)			1.7				0.6				0.5
Qualified subsidiary election			(0.6	)			(0.8	)			0.6
Valuation allowance against deferred tax assets			2.9				3.1				(0.3	)
Research and development credit			(2.2	)			(2.2	)			(2.9	)
Foreign rate differential			(1.9	)			(2.8	)			(1.8	)
Tax reserves			0.9				1.4				1.5
Domestic manufacturing deduction			(2.5	)			(1.8	)			(1.4	)
Miscellaneous			(0.4	)			0.9				0.3
Transition tax			3.2				-				-
Revaluation of deferred tax liability			(5.7	)			-				-
Total			30.4	%			33.4	%			31.5	%

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

		December 31,
(in thousands)		2017				2016
Deferred tax assets:
Accrued expenses		$	756			$	857
Warrants and stock options			2,309				3,226
Intangibles			429				612
Inventories			220				169
Other assets			625				983
Net operating loss			6,374				4,333
Less valuation allowance			(6,633	)			(4,559	)
Total deferred tax assets			4,080				5,621
Deferred tax liabilities:
Depreciation			(9,528	)			(10,860	)
Goodwill			(1,518	)			(1,764	)
Total deferred tax liabilities			(11,046	)			(12,624	)
Net deferred tax liability		$	(6,966	)		$	(7,003	)

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

		December 31,
		2017				2016
Balance at beginning of period		$	3,796			$	2,769
Additions for tax positions of current year			831				1,077
Additions for tax positions of prior years			48				170
Decrease related to expiration of statutes of limitations			(442	)			(220	)
Balance at period end		$	4,233			$	3,796

X

- Definition

Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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