Stock options (Details 1) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Outstanding at beginning	5,004,167	4,167
Options Outstanding Weighted Average Remaining Contractual Life	9 years 2 months 30 days
Options Exercisable Weighted Average Exercise Price
Options Exercisable Ending	0.33
Options Exercisable Weighted Average Exercise Price Ending	0.33
Maximum [Member]
Options Outstanding Range of Exercise Prices	3.12
Minimum [Member]
Options Outstanding Range of Exercise Prices	$ 0.33