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Note 6 - Commitments and Contingencies (Tables)
6 Months Ended
Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]  
Schedule of future minimum lease commitments
Year ending December 31:      
     2019     34,000  
     2020     71,000  
     2021     61,000  
Total minimum lease payments   $ 166,000