Note 14 - Common stock warrants: Schedule of Series B and Series D common stock warrants (Details) - shares	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Series B
Warrants Outstanding, Starting Balance	87,456	0
Common Stock Warrants Reinstated		87,456
Warrants Issued	0	0
Warrants Exercised	0	0
Warrants Outstanding, Ending Balance	87,456	87,456
Series D
Warrants Outstanding, Starting Balance	6,252,954	6,666,007
Common Stock Warrants Reinstated		29,544
Warrants Issued	0	0
Warrants Exercised	0	(442,597)
Warrants Outstanding, Ending Balance	6,252,954	6,252,954
B and D Total
Warrants Outstanding, Starting Balance	6,340,410	6,666,007
Common Stock Warrants Reinstated		117,000
Warrants Issued	0	0
Warrants Exercised	0	(442,597)
Warrants Outstanding, Ending Balance	6,340,410	6,340,410