7. Stockholders' equity (Tables)

12 Months Ended

Dec. 31, 2015

Stockholders Equity Tables

Summary of stock option activity

			Number of options		Weighted average exercise price
	Outstanding, December 31, 2013		1,410,000	$	0.19
	Granted		-		-
	Exercised		(55,000)		0.17
	Expired		(835,000)		0.21
	Outstanding, December 31, 2014		520,000	$	0.15
Granted		-				-
Exercised		(515,000)				0.15
Expired		(5,000)				0.15
Outstanding, December 31, 2015		-		$		-