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3. ACCOUNTS RECEIVABLE (Details) - USD ($)
Jun. 30, 2016
Dec. 31, 2015
Accounts Receivable Details    
Accounts receivable $ 2,043,951 $ 1,990,283
Allowances for doubtful accounts (37,939) (35,406)
Accounts receivable net current $ 2,006,012 $ 1,954,877