Note 11 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

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

	For the Years Ended December 31,
	2014		2013
Current	$	934,000	$	888,000
Deferred		267,000		(3,000	)
	$	1,201,000	$	885,000

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

	December 31,
	2014			2013
Current deferred income taxes:
Foreign tax credits	$	16,000		$	51,000
Temporary differences:
Inventory reserve		158,000			204,000
Accrued expenses and inventory		312,000			385,000
Current deferred income tax assets, net	$	486,000		$	640,000
Non-current deferred income taxes:
Temporary differences:
Property and equipment	$	(755,000	)	$	(696,000	)
Intangible assets		(3,000	)		(3,000	)
Marketable securities		(758,000	)		(374,000	)
Basis difference in investments		(129,000	)		(119,000	)
Foreign exchange		(35,000	)		(21,000	)
State income taxes		(72,000	)		(44,000	)
Non-current deferred tax liabilities		(1,752,000	)		(1,257,000	)
Net deferred income tax liability	$	(1,266,000	)	$	(617,000	)

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

	For the Years Ended December 31,
	2014			2013
Income taxes based on US statutory rate of 34%	$	1,340,000		$	1,008,000
Non-deductible meals and entertainment		5,000			5,000
Domestic manufacturer's deduction		(41,000	)		(53,000	)
Foreign taxes		(102,000	)		(71,000	)
State taxes		88,000			70,000
Other		(89,000	)		(74,000	)
	$	1,201,000		$	885,000

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

	For the Years Ended December 31,
	2014		2013
Balance as of January 1	$	194,000	$	342,000
Gross increase from tax positions taken during the year		-		-
Gross increase from tax positions taken during prior periods		-		-
Reductions to unrecognized tax benefits		-		(148,000	)
Balance as of December 31	$	194,000	$	194,000