Earnings Per Share (Tables)

3 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table outlines basic and diluted EPS:

	Three Months Ended December 31,
	2015			2014
	(in thousands, except per share amounts)
Basic Loss Per Share Computation
Net loss attributable to Amtech Systems, Inc.	$	(4,015	)	$	(5,195	)
Weighted Average Shares Outstanding:
Common stock	13,152			9,854
Basic loss per share attributable to Amtech shareholders	$	(0.31	)	$	(0.53	)
Diluted Loss Per Share Computation
Net loss attributable to Amtech Systems, Inc.	$	(4,015	)	$	(5,195	)
Weighted Average Shares Outstanding:
Common stock	13,152			9,854
Common stock equivalents (1)	—			—
Diluted shares	13,152			9,854
Diluted loss per share attributable to Amtech shareholders	$	(0.31	)	$	(0.53	)

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