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 ($)
Jun. 30, 2017
Dec. 31, 2016
Inventory Disclosure [Line Items]    
Purchased Parts and Components $ 2,226,656 $ 1,990,026
Work in Process 302,387 454,120
Finished Goods 1,584,343 831,069
Less: Reserve for Obsolescence (706,245) (623,997)
Net $ 3,407,141 $ 2,651,218