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Note 8 - Inventories - Inventories (Details) - USD ($)
Jun. 30, 2015
Dec. 31, 2014
Raw materials $ 5,422,506 $ 6,161,363
Work-in-process 3,157,888 3,041,227
Finished goods 3,137,849 3,204,186
Total $ 11,718,243 $ 12,406,776