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Note 1 - Organization and Description of Business (Details Textual) - One Customer [Member] - USD ($)
9 Months Ended 19 Months Ended
Sep. 30, 2017
Jun. 30, 2017
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]    
Concentration Risk, Percentage 57.80%  
AMIRON Products [Member]    
Revenue, Net   $ 5,000,000
Supply Commitment, Additional Amount the Customer May Elect Upon Extension $ 5,000,000  
Supply Commitment, Agreement Period 5 years  
Supply Commitment, Agreement Period After Extension 10 years  
Accounts Receivable, Net $ 0