Revenue (Tables)

9 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following tables summarize revenue by customer, product and income statement classification:

	Three months ended June 30, 2020						Three months ended June 30, 2019
	Gas utility		Non utility		Total operating revenues		Gas utility		Non utility		Total operating revenues
Natural Gas (Billed and Unbilled):
Residential	$	6,682,586	$	—	$	6,682,586	$	5,798,846	$	—	$	5,798,846
Commercial	3,157,873		—		3,157,873		4,116,695		—		4,116,695
Industrial and Transportation	1,401,775		—		1,401,775		1,098,393		—		1,098,393
Other	56,723		215,465		272,188		86,714		148,002		234,716
Total contracts with customers	11,298,957		215,465		11,514,422		11,100,648		148,002		11,248,650
Alternative Revenue Programs	(442,504)		—		(442,504)		434,300		—		434,300
Total operating revenues	$	10,856,453	$	215,465	$	11,071,918	$	11,534,948	$	148,002	$	11,682,950
	Nine months ended June 30, 2020						Nine months ended June 30, 2019
	Gas utility		Non utility		Total operating revenues		Gas utility		Non utility		Total operating revenues
Natural Gas (Billed and Unbilled):
Residential	$	31,859,828	$	—	$	31,859,828	$	34,263,845	$	—	$	34,263,845
Commercial	15,260,652		—		15,260,652		19,772,433		—		19,772,433
Industrial and Transportation	3,972,444		—		3,972,444		3,563,505		—		3,563,505
Revenue reductions (TCJA) (1)	—		—		—		(523,881)		—		(523,881)
Other	390,184		537,324		927,508		421,624		544,378		966,002
Total contracts with customers	51,483,108		537,324		52,020,432		57,497,526		544,378		58,041,904
Alternative Revenue Programs	1,274,670		—		1,274,670		132,752		—		132,752
Total operating revenues	$	52,757,778	$	537,324	$	53,295,102	$	57,630,278	$	544,378	$	58,174,656
(1) Accrued refund associated with excess revenue collected in tariff rates associated with the reduction in federal income tax rates.

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 June 30, 2020	2,257,426		897,589		1,133,566		1,652,387
Increase (decrease)	$	(333,276)	$	(338,795)	$	253,271	$	220,356
(1) Included in accounts receivable in the condensed consolidated balance sheet. Amounts shown net of reserve for bad debts.