Quarterly report pursuant to Section 13 or 15(d)

3. INVENTORIES (Details)

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3. INVENTORIES (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 13,799,170 $ 14,019,668
Work-in-progress 870,264 0
Finished goods 3,770,478 4,596,501
Total inventories $ 18,439,912 $ 18,616,169