Note 10 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

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

	Years Ended December 31,
	2014		2013
Domestic	$	4,061	$	3,245
Foreign		848		763
	$	4,909	$	4,008

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

	Years Ended December 31,
	2014			2013
Current
Domestic -- Federal	$	1,073		$	515
Domestic -- state		78			74
Foreign		1			35
	$	1,152			624
Deferred
Domestic -- Federal		401			218
Domestic -- state		256			212
Foreign		(339	)		(123	)
		318			307
Income tax expense	$	1,470		$	931

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

	December 31,
Deferred tax assets:	2014			2013
Depreciation of property and equipment	$	596		$	646
Net operating loss ("NOL") (state and foreign)		513			829
Intangibles		224			162
Inventories		184			180
Accrued vacation pay and stock-based compensation		126			169
Tax credit carryforwards (foreign, research and AMT)		92			269
Allowance for doubtful accounts		56			56
Acquisition costs		34			37
Accrued warranty		6			11
Other		21			26
		1,852			2,385
Valuation allowance		(100	)		(287	)
Deferred tax assets		1,752			2,098
Deferred tax liabilities:
Net intangible assets		(232	)		(260	)
Unremitted earnings of foreign subsidiaries		(107	)		(107	)
Deferred tax liabilities		(339	)		(367	)
Net deferred tax asset	$	1,413		$	1,731

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

	Years Ended December 31,
	2014			2013
Expected income tax provision at U.S. statutory rate	$	1,669		$	1,363
Increase (decrease) in tax from:
Changes in valuation allowance		(187	)		(286	)
Current year tax credits (foreign and research)		(179	)		(417	)
Foreign income tax rate differences		(63	)		(80	)
Deemed dividend from foreign subsidiaries		208			135
NOL carryforwards utilized		93			200
Domestic tax expense, net of Federal benefit		52			127
Nondeductible expenses		7			10
Other		(130	)		(121	)
Income tax expense	$	1,470		$	931