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, 2019
Dec. 31, 2018
Inventory Disclosure [Line Items]    
Purchased Parts and Components $ 3,206,094 $ 3,284,848
Work in Process 631,840 1,523,616
Finished Goods 4,783,213 2,837,183
Less: Reserve for Obsolescence (510,921) (363,845)
Inventories, Net $ 8,110,226 $ 7,281,802