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ACCOUNTS RECEIVABLE AND ALLOWANCE FOR DOUBTFUL ACCOUNTS (Details) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable $ 9,861,000 $ 7,991,000
Allowance for doubtful accounts (80,000) (85,000)
Accounts Receivable, Net, Current, Total $ 9,781,000 $ 7,906,000