Quarterly report pursuant to Section 13 or 15(d)

Inventory (Details)

v3.19.3
Inventory (Details) - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Inventory, Net [Abstract]    
Raw materials $ 4,285,830 $ 4,319,637
Work in process 422,176 702,079
Finished goods 0 0
Inventory, gross 4,708,006 5,021,716
Less: Inventory reserve 2,510,323 2,488,100
Inventory, total $ 2,197,683 $ 2,533,616