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Unaudited Quarterly Financial Information
12 Months Ended
Sep. 30, 2018
Quarterly Financial Information Disclosure [Abstract]  
Unaudited Quarterly Financial Information

A summary of the unaudited quarterly results of operations for the years 2018 and 2017 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

2018
 
First
 
Second
 
Third
 
Fourth
 
Total
Operating revenues
$
2,549

 
$
2,792

 
$
2,707

 
$
3,185

 
$
11,233

Operating expenses
1,951

 
2,027

 
1,942

 
3,001

 
8,921

Operating income
598

 
765

 
765

 
184

 
2,312

Net income (loss)
288

 
462

 
470

 
(101
)
 
1,119

Unaudited Quarterly Financial Information

2017
 
First
 
Second
 
Third
 
Fourth
 
Total
Operating revenues
$
2,546

 
$
2,547

 
$
2,571

 
$
3,075

 
$
10,739

Operating expenses
2,117

 
2,013

 
2,010

 
2,624

 
8,764

Operating income
429

 
534

 
561

 
451

 
1,975

Net income (loss)
102

 
211

 
233

 
139

 
685