Earnings Per Share

Basic earnings per share (“EPS”) is computed by dividing net income (loss) by the weighted average number of common shares outstanding for the period. Diluted EPS is computed similarly to basic EPS except that the denominator is increased to include the number of additional common shares that would have been outstanding if potentially dilutive common shares had been issued. In the case of a net loss, diluted earnings per share is calculated in the same manner as basic EPS.

For the three months ended December 31, 2018 and December 31, 2017, options for 1,198,000 and 120,000 weighted average shares, respectively, were excluded from the diluted EPS calculations because they were anti-dilutive. These shares could become dilutive in the future.

A reconciliation of the denominators of the basic and diluted EPS calculations follows (in thousands, except per share amounts):



	Three Months Ended December 31,
	2018			2017
Numerator:
Net (loss) income attributable to Amtech Systems, Inc.	$	(2,372	)	$	6,452

Denominator:
Weighted-average shares used to compute basic EPS	14,220			14,781
Common stock equivalents (1)	—			517
Weighted-average shares used to compute diluted EPS	14,220			15,298

Basic (loss) income per share attributable to Amtech shareholders	$	(0.17	)	$	0.44
Diluted (loss) income per share attributable to Amtech shareholders	$	(0.17	)	$	0.42

(1) The number of common stock equivalents is calculated using the treasury method and the average market price during the period.