Note 11 - Fair Value Measurement (Details) - Change in Level 3 Financial Liabilities Fair Value (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Derivatives:
Balance, beginning of year	$ (9,070,183)	$ (8,574,921)
Net realized gains/(losses)	0	0
Net Unrealized (gains)/losses relating to instruments still held at the reporting date	58,807	(95,121)
Net purchases, issuances and settlements	(628,086)	(400,141)
Net transfers in and/or out of Level 3	0	0
Balance, end of period	(9,639,462)	(9,070,183)
Conversion Feature Liability [Member]
Derivatives:
Balance, beginning of year	(3,126,206)	(2,287,323)
Net realized gains/(losses)	0	0
Net Unrealized (gains)/losses relating to instruments still held at the reporting date	181,804	(838,883)
Net purchases, issuances and settlements	0	0
Net transfers in and/or out of Level 3	0	0
Balance, end of period	(2,944,402)	(3,126,206)
Warrant Liability [Member]
Derivatives:
Balance, beginning of year	(5,943,977)	(6,287,598)
Net realized gains/(losses)	0	0
Net Unrealized (gains)/losses relating to instruments still held at the reporting date	(122,997)	743,762
Net purchases, issuances and settlements	(628,086)	(400,141)
Net transfers in and/or out of Level 3	0	0
Balance, end of period	$ (6,695,060)	$ (5,943,977)