Note 12 - Stockholders' (Deficit) - Warrants Activity (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Balance (in shares)	27,020,000
Issued (in shares)	0	0
Class of Warrant or Right, Exercised During Period	(4,000,000)	0
Expired/forfeited (in shares)	(1,000,000)	(840,000)
Balance (in shares)	22,020,000	27,020,000
Warrants exercisable at December 31, 2018 (in shares)	22,020,000	27,020,000