NOTE 4— NET INCOME (LOSS) PER COMMON SHARE

Basic earnings per share is computed by dividing net income available to common stockholders by the weighted average number of common shares outstanding for the period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that would share in the net income of the Company. For the year ended December 31, 2016 and 2015, the effect of 34,374 stock appreciation rights (“SARs”) have not been considered in the diluted earnings per share, since the market price of the stock was less than the exercise price during the period in the computation.

The following tables set forth the computation of basic and diluted earnings (loss) per share:


	Years Ended December 31,
	2017		2016		2015
Basic:
Net (loss) income attributable to ISG	$	(2,130)	$	(6,505)	$	4,841
Weighted average common shares		43,025		36,625		37,186
(Loss) earnings per share attributable to ISG	$	(0.05)	$	(0.18)	$	0.13
Diluted:
Net (loss) income attributable to ISG	$	(2,130)	$	(6,505)	$	4,841
Interest expense of convertible debt, net of tax		—		—		80
Net (loss) income attributable to ISG, as adjusted	$	(2,130)	$	(6,505)	$	4,921
Basic weighted average common shares		43,025		36,625		37,186
Potential common shares		—		—		1,750
Diluted weighted average common shares		43,025		36,625		38,936
Diluted (loss) earnings per share attributable to ISG	$	(0.05)	$	(0.18)	$	0.13