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Note 10 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	Nov. 05, 2018	Sep. 30, 2018	Jul. 27, 2018	Feb. 28, 2018	Dec. 31, 2017
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		18,355,017			15,855,017
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 0.15			$ 0.18
November 2018 Great Harbor Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights				$ 0.01
Subsequent Event [Member] \| November 2018 Great Harbor Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	2,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 0.01
Great Harbour Note 4 [Member] \| Subsequent Event [Member]
Debt Instrument, Face Amount	$ 4,000
Debt Instrument, Interest Rate, Stated Percentage	8.50%
Related-Party Debt January 2015 Note Payable to Golisano Holdings LLC (Formerly Payable to JL-BBNC Mezz Utah, LLC) [Member]
Debt Instrument, Face Amount			$ 4,000
Long-term Debt, Total		$ 3,857			$ 3,171
Related-Party Debt January 2015 Note Payable to Golisano Holdings LLC (Formerly Payable to JL-BBNC Mezz Utah, LLC) [Member] \| Subsequent Event [Member]
Long-term Debt, Total	$ 4,000