10. Stockholders' deficit - Warrants Outstanding (Details) - Warrants - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Beginning balance, warrants	6,300,000	6,300,000
Beginning balance, warrants exercise price	$ 0.0033	$ 0.15
Warrants Granted, shares	19,337,409
Warrants granted, price	$ 0.03
Warrants Cancelled, shares	(6,000,000)
Warrants cancelled, price	$ 0.15
Warrant Exercised, shares		6,300,000
Warrants Exercised, price		$ 0.00
Ending Balance, warrants	19,637,409	6,300,000
Ending Balance, warrants exercise price	$ 0.03	$ 0.0033