Note 7 - Convertible Debt (PIK Notes) - Convertible Debt PIK Notes (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017	Nov. 03, 2014
Less: Discount	$ (7,542,091)	$ (9,755,832)
Series 2023 Notes [Member]
Derivative Liability			$ 2,055,000
Series A Notes [Member]
Derivative Liability			$ 9,212,285
Payment in Kind (PIK) Note [Member]
PIK Note Payable, Gross	43,062,118	43,000,437
Less: Discount	(7,049,149)	(9,240,138)
Less: Deferred Financing Cost	(492,943)	(515,694)
PIK Note Payable, Net	35,520,026	33,244,605
Derivative Liability	10,227,191	2,047,264
Payment in Kind (PIK) Note [Member] | Series 2023 Notes [Member]
PIK Note Payable, Gross	16,152,402	16,090,721
Less: Discount	(1,493,895)	(1,538,299)
Less: Deferred Financing Cost	(211,518)	(221,280)
PIK Note Payable, Net	14,446,989	14,331,142
Derivative Liability	876,063	163,634
Payment in Kind (PIK) Note [Member] | Series A Notes [Member]
PIK Note Payable, Gross	26,909,716	26,909,716
Less: Discount	(5,555,254)	(7,701,839)
Less: Deferred Financing Cost	(281,425)	(294,414)
PIK Note Payable, Net	21,073,037	18,913,463
Derivative Liability	$ 9,351,128	$ 1,883,630