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, 2017, options for 120,000 weighted average shares are excluded from the diluted EPS calculations because they are anti-dilutive. For the three months ended December 31, 2016, options for 1,886,000 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, in thousands, except per share amounts:



	Three Months Ended December 31,
	2017		2016
Basic Income (Loss) Per Share Computation
Net income (loss) attributable to Amtech Systems, Inc.	$	6,452	$	(53	)
Weighted Average Shares Outstanding:
Common stock	14,781		13,179
Basic income (loss) per share attributable to Amtech shareholders	$	0.44	$(0.00)
Diluted Income (Loss) Per Share Computation
Net income (loss) attributable to Amtech Systems, Inc.	$	6,452	$	(53	)
Weighted Average Shares Outstanding:
Common stock	14,781		13,179
Common stock equivalents (1)	517		—
Diluted shares	15,298		13,179
Diluted income (loss) per share attributable to Amtech shareholders	$	0.42	$(0.00)

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