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Business Segment Information (Tables)
 3 Months Ended
Dec. 31, 2016
Segment Reporting [Abstract]  
Business Segment Information
Information concerning our business segments is as follows:
 
Three Months ended December 31,
 
2016
 
2015
 
(dollars in thousands)
Net Revenues:
 
 
 
Solar *
$
11,424

 
$
9,543

Semiconductor
15,703

 
10,700

Polishing
2,008

 
1,831

 
$
29,135

 
$
22,074

Operating income (loss):
 
 
 
Solar *
$
(1,023
)
 
$
(1,864
)
Semiconductor
2,361

 
(160
)
Polishing
464

 
169

Non-segment related
(1,982
)
 
(2,074
)
 
$
(180
)
 
$
(3,929
)

* 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.

 
December 31,
2016
 
September 30,
2016
 
(dollars in thousands)
Identifiable Assets:
 
 
 
Solar
$
43,334

 
$
42,962

Semiconductor
51,898

 
51,985

Polishing
4,906

 
4,819

Non-segment related
15,780

 
18,664

 
$
115,918

 
$
118,430