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Inventories, Net (Components of Inventories) (Detail) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Inventory Disclosure [Line Items]    
Purchased Parts and Components $ 1,251,224us-gaap_InventoryRawMaterialsAndPurchasedPartsNetOfReserves $ 1,094,250us-gaap_InventoryRawMaterialsAndPurchasedPartsNetOfReserves
Work in Process 25,974us-gaap_InventoryWorkInProcessNetOfReserves 153,065us-gaap_InventoryWorkInProcessNetOfReserves
Finished Goods 300,889us-gaap_InventoryFinishedGoodsNetOfReserves 280,279us-gaap_InventoryFinishedGoodsNetOfReserves
Less: Reserve for Obsolescence (666,138)us-gaap_InventoryValuationReserves (573,967)us-gaap_InventoryValuationReserves
Net $ 911,949us-gaap_InventoryNet $ 953,627us-gaap_InventoryNet