Note 12 - Subsequent Events. - Conversion of Convertible Promissory Notes (Details) - USD ($)	May 07, 2018	Mar. 31, 2018	Dec. 31, 2017
Convertible notes, principal outstanding		$ 7,558,118	$ 6,788,118
Convertible Notes Maturing on June 1, 2018 [Member]
Convertible notes, principal outstanding		4,468,847
Convertible Notes Maturing on June 1, 2018 [Member] | Subsequent Event [Member]
Convertible notes, principal outstanding	$ 1,314,380
Amounts converted to stock	(3,154,467)
Convertible Notes Maturing on June 17, 2019 [Member]
Convertible notes, principal outstanding		283,571
Convertible Notes Maturing on June 17, 2019 [Member] | Subsequent Event [Member]
Convertible notes, principal outstanding
Amounts converted to stock	(283,571)
Convertible Notes Maturing on December 31, 2019 [Member]
Convertible notes, principal outstanding		292,000
Convertible Notes Maturing on December 31, 2019 [Member] | Subsequent Event [Member]
Convertible notes, principal outstanding	75,000
Amounts converted to stock	(217,000)
Convertible Notes, Maturing on June 20, 2020 [Member]
Convertible notes, principal outstanding		$ 603,700
Convertible Notes, Maturing on June 20, 2020 [Member] | Subsequent Event [Member]
Convertible notes, principal outstanding	125,000
Amounts converted to stock	$ (478,700)