Derivative liability - Movement (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Derivative Liability Details 1
Opening balance	$ 2,859,832
Derivative liability arising from convertible notes	1,349,748	1,826,500
Fair value adjustment to derivative liability	771,000	1,033,332
Total Derivative Liability	$ 4,980,580	$ 2,859,832