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Unaudited Quarterly Financial Information
 12 Months Ended
Sep. 30, 2016
Quarterly Financial Information Disclosure [Abstract]  
Unaudited Quarterly Financial Information
Unaudited Quarterly Financial Information

A summary of the unaudited quarterly results of operations for the years 2016 and 2015 follows.  This summary should be read in conjunction with the audited consolidated financial statements appearing herein.  Results for interim periods may fluctuate as a result of seasonal weather conditions, changes in rates, and other factors.
Unaudited Quarterly Financial Information

2016
 
First
 
Second
 
Third
 
Fourth
 
Total
Operating revenues
$
2,280

 
$
2,571

 
$
2,479

 
$
3,286

 
$
10,616

Operating expenses
2,052

 
1,982

 
1,913

 
2,343

 
8,290

Operating income
228

 
589

 
566

 
943

 
2,326

Net income (loss)
(37
)
 
318

 
291

 
661

 
1,233


Unaudited Quarterly Financial Information

2015
 
First
 
Second
 
Third
 
Fourth
 
Total
Operating revenues
$
2,411

 
$
2,863

 
$
2,558

 
$
3,171

 
$
11,003

Operating expenses
2,047

 
2,087

 
2,252

 
2,402

 
8,788

Operating income
364

 
776

 
306

 
769

 
2,215

Net income (loss)
81

 
496

 
32

 
502

 
1,111