Note 12 - Stockholders' (Deficit) - Warrants Activity (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Balance (in shares)	27,860,000	22,900,000
Issued (in shares)	0	4,970,000
Exercised (in shares)	0	0
Expired/forfeited (in shares)	(840,000)	(10,000)
Balance (in shares)	27,020,000	27,860,000
Warrants exercisable at December 31, 2017 (in shares)	27,020,000	27,860,000