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Note 2 - Inventories (Details) - Major Components of Inventories (USD $)
Jun. 30, 2014
Dec. 31, 2013
Major Components of Inventories [Abstract]    
Finished products $ 1,791,334 $ 1,638,997
Work-in-process 2,444,272 1,934,493
Raw materials 4,262,412 3,897,207
$ 8,498,018 $ 7,470,697