11. Stockholders' deficit (Tables)

12 Months Ended

Dec. 31, 2015

Equity [Abstract]

Warrants outstanding

	Number of warrants outstanding		Weighted average exercise price per share
Outstanding at January 1, 2014		4,500,000	$	0.15
Granted		1,800,000		0.13
Cancelled/forfeited		—		—
Exercised		—		—
Outstanding at December 31, 2014		6,300,000	$	0.14
Granted		—		—
Cancelled/forfeited		—		—
Exercised		—		—
Outstanding at December 31, 2015		6,300,000	$	0.14

The following table summarizes information about warrants outstanding at December 31, 2015

		Warrants outstanding and exercisable
Exercise price		Number of warrants		Weighted average remaining contractual years		Weighted average exercise price
$	0.003		300,000		*	$	0.03
$	0.15		6,000,000		0.28		0.15
			6,300,000			$	0.14

Options Outstanding

	Number of options outstanding			Weighted average exercise price per share
Outstanding at January 1, 2014		3,600,000		$	0.20
Granted		480,000			0.12
Cancelled/forfeited		(3,600,000	)		(0.20	)
Exercised		—
Outstanding at December 31, 2014		480,000			0.12
Granted		—			—
Cancelled/forfeited		—			—
Exercised		—			—
Outstanding at December 31, 2015		480,000		$	0.12

The following table summarizes information about options outstanding at December 31, 2015

		Options outstanding				Options Exercisable
Exercise price		Number of options		Weighted average remaining contractual years		Weighted average exercise price		Number of options		Weighted average exercise price
$	0.12		480,000		3.84	$	0.12		280,000	$	0.12