Quarterly report pursuant to Section 13 or 15(d)

Inventory (Tables)

v3.19.3
Inventory (Tables)
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
2019 2018
Raw materials $ 4,285,830    $ 4,319,637   
Work in process 422,176    702,079   
Finished goods —    —   
4,708,006    5,021,716   
Less: Inventory reserve 2,510,323    2,488,100   
$ 2,197,683    $ 2,533,616