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3. ACCOUNTS RECEIVABLE (Details) - USD ($)
Mar. 31, 2017
Dec. 31, 2016
Accounts Receivable Details    
Accounts receivable $ 3,430,391 $ 3,044,652
Allowances for doubtful accounts (37,225) (36,499)
Accounts receivable net current $ 3,393,166 $ 3,008,153