Note 8 - Convertible Debt (PIK Notes) - Convertible Debt PIK Notes (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016	Nov. 03, 2014	Aug. 01, 2013
Less: Discount	$ (9,755,832)	$ (15,143,123)
Payment in Kind (PIK) Note [Member]
PIK Note Payable, Gross	43,000,437	38,196,966
Less: Discount	(9,240,138)	(15,143,123)
Less: Deferred Financing Cost	(515,694)	(13,750)
PIK Note Payable, Net	33,244,605	23,040,093
PIK Note Derivative Liability	2,047,264	2,176,552
Payment in Kind (PIK) Note [Member] | Series 2023 Notes [Member]
PIK Note Payable, Gross	16,090,721	14,071,008		$ 10,500,000
Less: Discount	(1,538,299)	(1,721,898)
Less: Deferred Financing Cost	(221,280)	(5,064)
PIK Note Payable, Net	16,090,721	12,344,046
PIK Note Derivative Liability	163,634	142,909
Payment in Kind (PIK) Note [Member] | Series A Notes [Member]
PIK Note Payable, Gross	26,909,716	24,125,958	$ 19,848,486
Less: Discount	(7,701,839)	(13,421,225)	$ (16,560,771)
Less: Deferred Financing Cost	(294,414)	(8,686)
PIK Note Payable, Net	26,909,721	10,696,047
PIK Note Derivative Liability	$ 1,883,630	$ 2,033,643