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Note 3 - Significant Accounting Policies (Details Textual)
3 Months Ended 9 Months Ended 103 Months Ended
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
Revenue, Remaining Performance Obligation, Amount $ 6,500,000   $ 6,500,000   $ 6,500,000
Product Warranty (Recovery) Expense 75,000 $ 0 $ 115,000 $ (238,967)  
Licensing Agreements [Member]          
Finite-Lived Intangible Asset, Useful Life     6 years    
Amortization of Intangible Assets, Total $ 5,250 $ 15,750 $ 5,250 $ 15,750  
IDIQ Agreement [Member] | ADEPT Units [Member]          
Units Delivered         224
Units to be Delivered 35   35   35