Quarterly report pursuant to Section 13 or 15(d)

Inventories, Net (Components of Inventories) (Detail)

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Inventories, Net (Components of Inventories) (Detail) - USD ($)
Sep. 30, 2017
Dec. 31, 2016
Inventory Disclosure [Line Items]    
Purchased Parts and Components $ 2,069,378 $ 1,990,026
Work in Process 212,444 454,120
Finished Goods 1,217,700 831,069
Less: Reserve for Obsolescence (656,931) (623,997)
Net $ 2,842,591 $ 2,651,218