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Note 7 - Warrant Derivative Liability (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2016
Sep. 30, 2016
Sep. 26, 2016
Dec. 31, 2012
Warrant Liabilities, Current, Weighted Average Price     $ 0.004   $ 0.01      
Warrant Liabilities, Current $ 3,000   $ 3,000   $ 24,000      
Share Price $ 0.04   $ 0.04   $ 0.05   $ 0.04  
Class of Warrant or Right, Exercise Price of Warrants or Rights           $ 0.14   $ 0.41
Gain (Loss) on Derivative Instruments, Net, Pretax $ 3,000 $ 13,000