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Business Segment Information (Tables)
 9 Months Ended
Jun. 30, 2016
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment
Information concerning our business segments is as follows:
 
Three Months ended June 30,
 
Nine Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
 
(dollars in thousands)
Net Revenues:
 
 
 
 
 
 
 
Solar (1)
$
19,001

 
$
24,392

 
$
38,346

 
$
42,141

Semiconductor
12,200

 
12,945

 
33,406

 
25,765

Polishing
2,141

 
2,679

 
6,147

 
8,779

 
$
33,342

 
$
40,016

 
$
77,899

 
$
76,685

Operating income (loss):
 
 
 
 
 
 
 
Solar (1)
$
(402
)
 
$
1,232

 
$
(4,532
)
 
$
(1,987
)
Semiconductor
1,056

 
(1,113
)
 
777

 
(483
)
Polishing
343

 
574

 
899

 
1,917

Non-segment related
(1,599
)
 
(1,927
)
 
(5,281
)
 
(7,409
)
 
$
(602
)
 
$
(1,234
)
 
$
(8,137
)
 
$
(7,962
)

(1) The financial statement of business units included in the Solar segment include some sales of equipment and parts to the semiconductor, silicon wafer and MEMS industries, comprising less than 25% of the Solar segment revenue.

 
June 30,
2016
 
September 30,
2015
 
(dollars in thousands)
Identifiable Assets:
 
 
 
Solar
$
50,580

 
$
45,717

Semiconductor
47,874

 
46,912

Polishing
5,274

 
5,793

Non-segment related
22,431

 
27,034

 
$
126,159

 
$
125,456