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Significant Accounting Policies, Trade Accounts Receivable and Allowance for Doubtful Accounts (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Receivables [Abstract]    
Allowance for doubtful accounts $ 7,000us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 2,000us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent