Quarterly report pursuant to Section 13 or 15(d)

Inventory (Details)

v3.19.3
Inventory (Details) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 4,478,201 $ 4,319,637
Work in process 422,176 702,079
Finished goods 0 0
Gross inventory 4,900,377 5,021,716
Less: Inventory reserve 2,511,389 2,488,100
Total inventory, net $ 2,388,988 $ 2,533,616