Earnings Per Share (Tables)

3 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share

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)