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3. INVENTORIES (Details) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Raw materials $ 396,482 $ 818,500
Finished goods 844,224 4,370,331
Work-in-process 0 692,850
Allowance for obsolete and slow-moving inventories (43,921) 0
Inventories $ 1,196,785 $ 5,881,681