Income (loss) per common share (Tables)

12 Months Ended

Dec. 31, 2017

Basic and diluted income (loss) per share for the years ended December 31, 2017 and 2016, respectively, was as follows:



	2017		2016
Net income (loss) attributable to stockholders	$	47,436	$	(1,096,283	)
Weighted average shares outstanding - Basic	23,171,033		19,295,922
Basic income (loss) per share	$	0.00	$	(0.06	)
Weighted average shares outstanding - Diluted	23,342,627		19,295,922
Diluted income (loss) per share	$	0.00	$	(0.06	)

Anti-dilutive shares underlying stock options outstanding	441,356		1,117,918
Anti-dilutive convertible debentures	—		889,831