Note 6 - Carrying Amount of the Company's Outstanding Debt (Details) (Parentheticals)	Dec. 31, 2015	Dec. 31, 2014
Senior Secured Debt, Due March 5, 2016 [Member]
Debt Instrument, Interest Rate, Stated Percentage	8.00%	8.00%
Senior Secured Debt, Due June 30, 2017 [Member]
Debt Instrument, Interest Rate, Stated Percentage	8.00%	8.00%
Convertible Note Instrument, Due March 5, 2018 [Member]
Debt Instrument, Interest Rate, Stated Percentage	7.00%	7.00%
Convertible Note Instrument, Due March 5, 2020 [Member]
Debt Instrument, Interest Rate, Stated Percentage	7.00%	7.00%