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 and nine months ended June 30, 2017, options for 1,152,000 and 1,649,000 weighted average shares, respectively, are excluded from the diluted EPS calculations because they are anti-dilutive. For the three and nine months ended June 30, 2016, options for 1,840,000 weighted average shares were excluded from the diluted EPS calculations because they were anti-dilutive. These shares could be dilutive in the future.

The following table outlines basic and diluted EPS:



	Three Months Ended June 30,					Nine Months Ended June 30,
	2017		2016			2017		2016
	(in thousands, except per share amounts)
Basic Income (Loss) Per Share Computation
Net income (loss) attributable to Amtech Systems, Inc.	$	3,287	$	(1,209	)	$	1,812	$	(6,722	)
Weighted Average Shares Outstanding:
Common stock	13,242		13,173			13,203		13,165
Basic income (loss) per share attributable to Amtech shareholders	$	0.25	$	(0.09	)	$	0.14	$	(0.51	)
Diluted Income (Loss) Per Share Computation
Net income (loss) attributable to Amtech Systems, Inc.	$	3,287	$	(1,209	)	$	1,812	$	(6,722	)
Weighted Average Shares Outstanding:
Common stock	13,242		13,173			13,203		13,165
Common stock equivalents (1)	156		—			85		—
Diluted shares	13,398		13,173			13,288		13,165
Diluted income (loss) per share attributable to Amtech shareholders	$	0.25	$	(0.09	)	$	0.14	$	(0.51	)

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