Note 11 - Income Taxes (Details) - Deferred Income Tax Assets (Liabilities) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Deferred Income Tax Assets (Liabilities) [Abstract]
Foreign tax credits	$ 51,000	$ 67,000
Temporary differences:
Inventory reserve	204,000	121,000
State income taxes		(13,000)
Accrued expenses and inventory	385,000	379,000
Current deferred income tax assets, net	640,000	554,000
Non-current deferred income taxes:
Property and equipment	(696,000)	(760,000)
Intangible assets	(3,000)
Other	(374,000)	(14,000)
Fair value adjustment - common stock warrants	(119,000)
Foreign exchange	(21,000)
State income taxes	(44,000)	(39,000)
Non-current deferred tax liabilities	(1,257,000)	(813,000)
Net deferred income tax liability	$ (617,000)	$ (259,000)