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 ($)
Mar. 31, 2018
Dec. 31, 2017
Inventory Disclosure [Line Items]    
Purchased Parts and Components $ 2,078,104 $ 1,669,209
Work in Process 7,179 25,090
Finished Goods 3,410,879 2,994,342
Less: Reserve for Obsolescence (1,219,832) (836,324)
Net $ 4,276,330 $ 3,852,317