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Note 5 - Inventories, Net - Inventories (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Raw materials $ 4,157,533us-gaap_InventoryRawMaterialsNetOfReserves $ 4,307,913us-gaap_InventoryRawMaterialsNetOfReserves
Work-in-process 453,709us-gaap_InventoryWorkInProcessNetOfReserves 419,731us-gaap_InventoryWorkInProcessNetOfReserves
Finished goods 91,227us-gaap_InventoryFinishedGoodsNetOfReserves 114,415us-gaap_InventoryFinishedGoodsNetOfReserves
Totals $ 4,702,469us-gaap_InventoryNet $ 4,842,059us-gaap_InventoryNet