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3. INVENTORIES (Details) - USD ($)
Jun. 30, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]    
Raw materials $ 993,737 $ 1,014,917
Finished goods 4,926,408 5,486,970
Work-in-progress 800,242 691,604
Allowance for obsolete and slow-moving inventory (12,427) (12,691)
Inventories $ 6,707,960 $ 7,180,800