Note 9 - Subsequent Events (Details Textual) - Subsequent Event [Member]	Oct. 06, 2017 USD ($) $ / shares shares
Warrants Issued to Mr Ikeda in Connection With Notes Payable Mr Ikeda [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	954,231
Warrants Issued to Mr Ikeda in Connection With Notes Payable Mr Ikeda Tranche 1 [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	498,981
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 0.10
Warrants Issued to Mr Ikeda in Connection With Notes Payable Mr Ikeda Tanche 2 [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	273,981
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 0.20
Warrants Issued to Mr Ikeda in Connection With Notes Payable Mr Ikeda Tranche 3 [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	181,269
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 0.30
Warrants Issued to Mr Berg in Connection with Notes Payable [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	318,077
Warrants Issued to Mr Berg in Connection with Notes Payable, Tranche 1 [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	166,327
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 0.10
Warrants Issued to Mr Berg in Connection with Notes Payable, Tranche 2 [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	91,327
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 0.20
Warrants Issued to Mr Berg in Connection with Notes Payable, Tanche 3 [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	60,423
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 0.30
Warrants Issued in Connection with New Loans [Member]
Warrants and Rights Outstanding | $	$ 367,000
Notes Payable, Mr Ikeda [Member]
Debt Instrument, Face Amount | $	300,000
Notes Payable, Mr Berg [Member]
Debt Instrument, Face Amount | $	$ 100,000
Notes Payable to Mr Berg and Mr Ikeda [Member]
Debt Instrument, Interest Rate, Stated Percentage	0.00%
Debt Instrument, Prepayment Penalty, Threshold Percentage	95.00%
Debt Instrument, Unamortized Discount | $	$ 191,000