Note 5 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

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

	As of December 31,
	2017			2016			2015
Current –
Federal	$	2,507		$	3,016		$	(214	)
State		101			114			(55	)
Foreign		898			-			-
		3,506			3,130			(269	)
Deferred –
Federal		(1,326	)		279			544
State		(124	)		(111	)		(439	)
Foreign		-			-			-
		(1,450	)		168			105
Income Tax Provision	$	2,056		$	3,298		$	(164	)

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

	2017			2016			2015
Federal statutory rate		34.0	%		34.0	%		34.0	%
State income taxes, net of federal benefit		-0.2	%		0.1	%		-22.0	%
Permanent differences		0.4	%		0.1	%		1.3	%
Stock based compensation		-0.7	%		0.0	%		3.9	%
Federal R&D Credits		-1.3	%		-1.1	%		-29.4	%
Foreign Taxes		7.1	%		0.0	%		0.0	%
Federal Deferred Rate Decrease		-14.2	%		0.0	%		0.0	%
Effective tax rate		25.1	%		33.1	%		-12.2	%

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

	Year Ended December 31,
	2017			2016
Net deferred tax liability:
Excess of tax over book depreciation and amortization	$	(1,980	)	$	(3,321	)
Prepaid expenses		(39	)		(55	)
Allowance for doubtful accounts		14			18
Accrued expenses		105			133
Stock-based compensation		79			135
R&D tax credits		578			397
Net deferred tax liabilities	$	(1,243	)	$	(2,693	)