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Revenue (Tables)
3 Months Ended
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
The following tables summarize revenue by customer, product and income statement classification:

 
Three months ended December 31, 2019
 
Three months ended December 31, 2018
 
Gas utility
Non utility
Total operating revenues
 
Gas utility
Non utility
Total operating revenues
Natural Gas (Billed and Unbilled):
 
 
 
 
 
 
 
Residential
$
12,290,361

$

$
12,290,361

 
$
13,012,592

$

$
13,012,592

Commercial
5,729,218


5,729,218

 
7,342,702


7,342,702

Industrial and Transportation
1,326,085


1,326,085

 
1,226,137


1,226,137

Revenue reductions (TCJA) (1)



 
(523,881
)

(523,881
)
Other
215,998

159,847

375,845

 
226,492

180,166

406,658

Total contracts with customers
19,561,662

159,847

19,721,509

 
21,284,042

180,166

21,464,208

Alternative Revenue Programs
63,944


63,944

 
(247,461
)

(247,461
)
Total operating revenues
$
19,625,606

$
159,847

$
19,785,453

 
$
21,036,581

$
180,166

$
21,216,747

 
 
 
 
 
 
 
 
(1) Accrued refund associated with excess revenue collected in tariff rates associated with the reduction in federal income tax rates. See Note 4 for more information.
Schedule of Customer Accounts Receivable
The balances of customer receivables are provided below:

 
Current Assets
 
Current Liabilities
 
Trade accounts receivable (1)
Unbilled revenue (1)
 
Customer credit balances
Customer deposits
Balance at September 30, 2019
$
2,590,702

$
1,236,384

 
$
880,295

$
1,432,031

Balance at December 31, 2019
6,278,383

3,690,130

 
821,643

1,549,435

Increase (decrease)
$
3,687,681

$
2,453,746

 
$
(58,652
)
$
117,404

 
 
 
 
 
 
(1) Included in accounts receivable in the condensed consolidated balance sheet. Amounts shown net of reserve for bad debts.