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Inventory (Details) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Details      
Inventory, Raw Materials, Gross $ 1,929,681 $ 2,009,691  
Inventory, Work in Process, Gross 2,101,618 1,869,830  
Inventory, Finished Goods, Gross 1,562,953 1,606,851  
Inventory, Gross 5,594,252 5,486,372  
Inventory Valuation Reserves 602,000 550,000  
Inventories, net $ 4,992,252 $ 4,936,372 $ 5,227,478