Quarterly report pursuant to Section 13 or 15(d)

Inventories - Summary of Inventories, Net (Details)

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Inventories - Summary of Inventories, Net (Details) - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 1,999,553 $ 2,079,589
Sub-assemblies 1,209,688 2,417,095
Work-in-Process 242,315  
Finished Goods 90,949  
Inventory, gross 3,542,505 4,496,684
Less: reserves for obsolete and slow-moving inventories (133,594) (800,354)
Inventory, net $ 3,408,911 $ 3,696,330