Loss per common share (Tables)

6 Months Ended

Jun. 30, 2017

Basic and diluted loss per share for the three and six months ended June 30, 2017 and 2016, respectively, were as follows:



	Three months ended June 30,						Six months ended June 30,
	2017			2016			2017			2016
Net loss attributable to stockholders	$	(293,540	)	$	(415,539	)	$	(248,755	)	$	(1,308,707	)
Weighted average shares outstanding - Basic and diluted	23,120,351			19,088,828			21,587,589			18,783,909
Basic loss per share	$(0.01)			$(0.02)			$	(0.01	)	$	(0.07	)
Anti-dilutive shares underlying stock options outstanding	1,053,778			1,196,776			1,053,778			1,196,776
Anti-dilutive convertible debentures	889,830			889,830			889,830			889,830
Anti-dilutive warrants outstanding	250,000			1,150,000			250,000			1,150,000