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Note 9 - Commitments and Contingencies (Details Textual)
1 Months Ended
Jun. 30, 2012
USD ($)
Jul. 31, 2015
EUR (€)
Jul. 31, 2015
USD ($)
Spanish Tax Authorities [Member]      
Input Tax $ 250,000    
Letters of Credit Outstanding, Amount   € 278,828 $ 305,372