11. Stockholders' deficit - Warrants Outstanding (Details) - Warrants - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Beginning balance, warrants	6,300,000	4,500,000
Beginning balance, warrants exercise price	$ .14	$ .15
Warrants Granted, shares		1,800,000
Warrants granted, price		$ 0.13
Ending Balance, warrants	6,300,000	6,300,000
Ending Balance, warrants exercise price	$ 0.14	$ .14
Weighted Average Contractual Life, warrants	3 months 11 days