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Business Segment Information (Tables)
 6 Months Ended
Mar. 31, 2017
Segment Reporting [Abstract]  
Business Segment Information
Information concerning our business segments is as follows:
 
Three Months Ended March 31,
 
Six Months Ended March 31,
 
2017
 
2016
 
2017
 
2016
 
(dollars in thousands)
Net Revenues:
 
 
 
 
 
 
 
Solar *
$
16,555

 
$
9,801

 
$
27,979

 
$
19,344

Semiconductor
13,443

 
10,507

 
29,146

 
21,206

Polishing
2,946

 
2,175

 
4,954

 
4,007

 
$
32,944

 
$
22,483

 
$
62,079

 
$
44,557

Operating income (loss):
 
 
 
 
 
 
 
Solar *
$
(1,878
)
 
$
(2,266
)
 
$
(2,901
)
 
$
(4,130
)
Semiconductor
1,403

 
(119
)
 
3,763

 
(279
)
Polishing
503

 
386

 
967

 
555

Non-segment related
(1,428
)
 
(1,608
)
 
(3,412
)
 
(3,681
)
 
$
(1,400
)
 
$
(3,607
)
 
$
(1,583
)
 
$
(7,535
)

* 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.

 
March 31,
2017
 
September 30,
2016
 
(dollars in thousands)
Identifiable Assets:
 
 
 
Solar
$
60,610

 
$
42,962

Semiconductor
52,670

 
51,985

Polishing
4,783

 
4,819

Non-segment related
16,975

 
18,664

 
$
135,038

 
$
118,430