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3. ACCOUNTS RECEIVABLE (Details) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Accounts Receivable Details    
Accounts receivable $ 3,863,923 $ 3,044,652
Allowances for doubtful accounts (38,991) (36,499)
Accounts receivable net current $ 3,824,932 $ 3,008,153