Note 15 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Notes Tables

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

	Year Ended December 31,
(in thousands)	2015		2014		2013
Domestic	$	59,421	$	51,052	$	45,659
Foreign		8,440		9,479		5,919
Total	$	67,861	$	60,531	$	51,578

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

	Year Ended December 31,
(in thousands)	2015			2014			2013
Current:
Federal	$	15,845		$	17,413		$	13,934
State		1,074			1,185			379
Foreign		1,591			2,149			1,762
Deferred
Federal		2,798			(1,821	)		168
State		(38	)		(17	)		(39	)
Foreign		294			130			(335	)
Valuation Allowance		(217	)		(143	)		432
Total	$	21,347		$	18,896		$	16,301

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

	Year Ended December 31,
	2015			2014			2013
Federal tax statutory rate		35.0	%		35.0	%		35.0	%
State tax (net of federal benefit)		0.5			0.5			0.6
Qualified subsidiary election		0.6			0.2			(0.8	)
Valuation allowance against deferred tax assets		(0.3	)		(0.2	)		0.8
Research and development credit		(2.9	)		(0.8	)		(1.8	)
Foreign rate differential		(1.8	)		(2.1	)		(1.6	)
Tax reserves		1.5			0.4			0.6
Domestic manufacturing deduction		(1.4	)		(2.1	)		(1.1	)
Miscellaneous		0.3			0.3			(0.1	)
Total		31.5	%		31.2	%		31.6	%

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

	December 31,
(in thousands)	2015			2014
Deferred tax assets:
Accrued expenses	$	628		$	378
Warrants and stock options		2,828			2,152
Intangibles		499			319
Inventories		177			172
Other assets		856			527
Net operating loss		2,409			2,842
Less valuation allowance		(2,625	)		(3,048	)
Total deferred tax assets		4,772			3,342
Deferred tax liabilities:
Depreciation		(7,945	)		(4,246	)
Goodwill		(1,067	)		(430	)
Total deferred tax liabilities		(9,012	)		(4,676	)
Net deferred tax liability	$	(4,240	)	$	(1,334	)

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

	December 31,
	2015		2014
Balance at beginning of period	$	1,295	$	695
Additions for tax positions of current year		919		632
Additions for tax positions of prior years		555		344
Decrease related to expiration of statutes of limitations		-		(376	)
Balance at period end	$	2,769	$	1,295