Share-based payments (Details 1)	6 Months Ended
	Jun. 30, 2020 USD ($) $ / shares shares
Share-based payments
Shares Outstanding, Beginning	9,735,836
Granted
Forfeited or expired	(900,000)
Shares Outstanding, Ending	8,835,836
Shares Exercised	8,835,836
Beginning balance | $ / shares	$ 0.36
Ending balance | $ / shares	0.09
Exercisable | $ / shares	$ 0.09
Beginning balance	1 year 3 months 18 days
Ending balance	10 months 24 days
Exercisable, Ending	10 months 24 days
Beginning balance | $	$ 2,000
Ending balance | $	0
Exercisable | $	$ 0