Note 7 - Convertible Debt PIK Notes (Details) - USD ($)	Jun. 30, 2016	Dec. 31, 2015	Nov. 03, 2014	Aug. 05, 2013
Payment in Kind (PIK) Note [Member] | Series 2023 Notes [Member]
Debt Instrument, Face Amount	$ 13,400,958	$ 12,762,816		$ 10,500,000
Less: Discount	(1,791,109)	(1,854,894)
Less: Deferred Financing Cost	(6,650)	(7,828)
PIK Note Payable, Net	11,603,199	10,900,094
PIK Note Derivative Liability	230,329	262,764
Payment in Kind (PIK) Note [Member] | Series A Notes [Member]
Debt Instrument, Face Amount	22,977,103	21,882,955	$ 19,848,486
Less: Discount	(14,841,648)	(15,717,991)	$ (7,348,486)
Less: Deferred Financing Cost	(10,850)	(13,422)
PIK Note Payable, Net	8,124,605	6,151,542
PIK Note Derivative Liability	3,626,505	4,876,093
Payment in Kind (PIK) Note [Member]
Debt Instrument, Face Amount	36,378,061	34,645,771
Less: Discount	(16,632,757)	(17,572,885)
Less: Deferred Financing Cost	(17,500)	(21,250)
PIK Note Payable, Net	19,727,804	17,051,636
PIK Note Derivative Liability	3,856,834	5,138,857
Less: Discount	$ (16,632,757)	$ (17,572,885)