Note 7 - Convertible Debt (PIK Notes) - Convertible Debt PIK Notes (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015	Nov. 03, 2014	Aug. 05, 2013
Payment in Kind (PIK) Note [Member] | Series 2023 Notes [Member]
PIK Note Payable, Gross	$ 14,071,008	$ 12,762,816		$ 10,500,000
Less: Discount	(1,761,939)	(1,854,894)
Less: Deferred Financing Cost	(5,755)	(7,828)
PIK Note Payable, Net	12,303,314	10,900,094
PIK Note Derivative Liability	197,873	262,764
Payment in Kind (PIK) Note [Member] | Series A Notes [Member]
PIK Note Payable, Gross	22,977,103	21,882,955	$ 19,848,486
Less: Discount	(14,156,077)	(15,717,991)	$ (7,348,486)
Less: Deferred Financing Cost	(9,870)	(13,422)
PIK Note Payable, Net	8,811,156	6,151,542
PIK Note Derivative Liability	2,685,275	4,876,093
Payment in Kind (PIK) Note [Member]
PIK Note Payable, Gross	37,048,111	34,645,771
Less: Discount	(15,918,016)	(17,572,885)
Less: Deferred Financing Cost	(15,625)	(21,250)
PIK Note Payable, Net	21,114,470	17,051,636
PIK Note Derivative Liability	2,883,148	5,138,857
Less: Discount	$ (15,918,016)	$ (1,572,885)