Note 16 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

	Years ended December 31,
	2018			2017			2016
Income before income taxes
Domestic	$	26,227		$	48,446		$	50,181
Foreign		(3,020	)		(2,244	)		689
	$	23,207		$	46,202		$	50,870

	Years ended December 31,
	2018			2017			2016
Provision for (benefit from) income taxes:
Current provision:
Federal	$	4,783		$	12,608		$	14,982
State		1,644			2,737			3,265
Foreign		405			31			302
		6,832			15,376			18,549
Deferred provision:
Federal		(992	)		(426	)		(70	)
State		(152	)		(68	)		(84	)
Foreign		(1,203	)		(496	)		(72	)
		(2,347	)		(990	)		(226	)
Total provision	$	4,485		$	14,386		$	18,323

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

	December 31,
	2018		2017
Deferred tax assets:
Net operating loss carry forward, foreign	$	1,382	$	959
Stock-based compensation expense		3,148		2,309
Foreign currency exchange		363		265
Accrued expenses and other		818		496
Inventory reserve		1,500		740
Deferred tax assets	$	7,211	$	4,769

	December 31,
	2018			2017
Deferred tax liabilities:
Acquisition-related Intangibles	$	(2,405	)	$	(2,743	)
Depreciation		(8,348	)		(7,419	)
Deferred tax liabilities	$	(10,753	)	$	(10,162	)
Net deferred tax liabilities	$	(3,542	)	$	(5,393	)

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

	Years ended December 31,
	2018			2017			2016
Statutory federal income tax rate		21.0	%		35.0	%		35.0	%
State tax expense, net of federal benefit		5.5	%		4.8	%		4.5	%
Impact of rate change on deferred taxes		0.0	%		(4.9	%)		0.0	%
Permanent items, including nondeductible expenses		(1.4	%)		0.1	%		0.1	%
State investment tax credit		(0.2	%)		(0.7	%)		(0.1	%)
Federal, state and foreign research and development credits		(3.4	%)		(1.4	%)		(0.9	%)
Foreign rate differential		(0.4	%)		0.5	%		(0.1	%)
Domestic production deduction		0.0	%		(2.8	%)		(2.9	%)
Stock compensation		(4.8	%)		(0.2	%)		0.1	%
Non-deductible Section 162(m) compensation limitation		4.3	%		0.7	%		0.3	%
Foreign derived intangible income deduction		(1.3	%)		0.0	%		0.0	%
Effective income tax rate		19.3	%		31.1	%		36.0	%