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Inventory Components (Details) - USD ($)
Jun. 30, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]    
Raw materials and sub-assemblies $ 2,051,088 $ 2,521,585
Finished goods 30,173 39,083
Inventory reserves (1,202,016) (1,234,578)
Inventories, net $ 879,245 $ 1,326,090