Note 22 - Subsequent events (Details)	9 Months Ended
Note 22 - Subsequent events (Details)	Sep. 30, 2020
Event 1
Subsequent Event, Date	Oct. 28, 2020
Subsequent Event, Description	Mentor received $31,000 for its 80% interest in any commercial opportunities resulting from a study performed by Dr. Mandelkorn
Event 2
Subsequent Event, Date	Oct. 28, 2020
Subsequent Event, Description	the $50,000 convertible note receivable from NeuCourt, originally maturing October 31, 2020, was amended to extend the maturity date to October 31, 2022
Event 3
Subsequent Event, Date	Nov. 04, 2020
Subsequent Event, Description	Mentors Motion for Summary Adjudication was granted as to several causes of action against G FarmaLabs Limited and guarantors Atanachi Gonzalez and Nicole Gonzalez in the Superior Court California for the County of Marin