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Note 6 - Accounts Receivable, Net (Details Textual) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Allowance for Doubtful Accounts Receivable, Current $ 80,212us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 49,489us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent