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2. INVENTORIES (Details) - USD ($)
Mar. 31, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Raw materials $ 796,244 $ 818,500
Finished goods 3,561,912 4,370,331
Work-in-progress 789,607 692,850
Allowance for obsolete and slow-moving inventory 0 0
Inventories $ 5,147,763 $ 5,881,681