Note 5 - Inventories (Details) - Inventories - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Inventories [Abstract]
Raw materials	$ 2,667	$ 2,505
Work in process	683	406
Inventory consigned to others	118	129
Finished goods	551	729
	$ 4,019	$ 3,769