Annual report pursuant to Section 13 and 15(d)

4. INVENTORIES (Tables)

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4. INVENTORIES (Tables)
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Schedule of inventory
    December 31,
2018
  December 31,
2017
         
Raw materials   $ 14,019,668     $ 10,143,149  
Work-in-progress     —         1,265,339  
Finished goods     4,596,501       1,219,693  
Total inventories   $ 18,616,169     $ 12,628,181