10. Stockholders' deficit - Warrants Outstanding (Details) - Warrants - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Beginning balance, warrants	6,300,000	6,300,000
Beginning balance, warrants exercise price	$ 0.143	$ 0.143
Warrants Cancelled, shares	(4,500,000)
Warrants cancelled, price	$ .150
Ending Balance, warrants	1,800,000	6,300,000
Ending Balance, warrants exercise price	$ .126	$ 0.143
Weighted Average Contractual Life, warrants	8 months 19 days