8. Stockholders' equity (Tables)

12 Months Ended

Dec. 31, 2012

Stockholders Equity Tables

Summary of stock option activity

A summary of stock option activity for the stock option plans for the years ended December 31, 2012 and 2011 are as follows:

	Number of  options			Weighted average exercise price
Outstanding, December 31, 2010		2,589,692		$	0.29
Granted		-			-
Exercised		-			-
Expired		(244,692	)		0.91
Outstanding, December 31, 2011		2,345,000		$	0.23
Granted		-			-
Exercised		-			-
Expired		(200,000	)		0.23
Outstanding, December 31, 2012		2,145,000		$	0.23

Outstanding and exercisable stock options

The following table summarizes information concerning outstanding and exercisable stock options at December 31, 2012:

Range of exercise prices per share		Number outstanding		Number exercisable		Expiry date
$	0.27		360,000		360,000	February 28, 2014(1)
	0.33		275,000		275,000	March 5, 2013(2)
	0.31		410,000		410,000	May 28, 2013
	0.17		530,000		530,000	June 19, 2014
	0.15		570,000		570,000	September 30, 2015
			2,145,000		2,145,000