Revenue (Tables)

6 Months Ended

Mar. 31, 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 March 31, 2020						Three months ended March 31, 2019
	Gas utility		Non utility		Total operating revenues		Gas utility			Non utility		Total operating revenues
Natural Gas (Billed and Unbilled):
Residential	$	12,892,659	$	—	$	12,892,659	$	15,397,504		$	—	$	15,397,504
Commercial	6,368,939		—		6,368,939		8,357,598			—		8,357,598
Industrial and Transportation	1,243,426		—		1,243,426		1,249,316			—		1,249,316
Other	117,466		162,012		279,478		108,418			216,210		324,628
Total contracts with customers	20,622,490		162,012		20,784,502		25,112,836			216,210		25,329,046
Alternative Revenue Programs	1,653,229		—		1,653,229		(54,087		)	—		(54,087		)
Total operating revenues	$	22,275,719	$	162,012	$	22,437,731	$	25,058,749		$	216,210	$	25,274,959
	Six months ended March 31, 2020						Six months ended March 31, 2019
	Gas utility		Non utility		Total operating revenues		Gas utility			Non utility		Total operating revenues
Natural Gas (Billed and Unbilled):
Residential	$	25,177,242	$	—	$	25,177,242	$	28,410,332		$	—	$	28,410,332
Commercial	12,102,779		—		12,102,779		15,700,155			—		15,700,155
Industrial and Transportation	2,570,669		—		2,570,669		2,475,364			—		2,475,364
Revenue reductions (TCJA) (1)	—		—		—		(523,881		)	—		(523,881		)
Other	333,461		321,859		655,320		334,908			396,376		731,284
Total contracts with customers	40,184,151		321,859		40,506,010		46,396,878			396,376		46,793,254
Alternative Revenue Programs	1,717,174		—		1,717,174		(301,548		)	—		(301,548		)
Total operating revenues	$	41,901,325	$	321,859	$	42,223,184	$	46,095,330		$	396,376	$	46,491,706
(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 March 31, 2020	3,776,033		1,539,460		1,361,720		1,622,779
Increase	$	1,185,331	$	303,076	$	481,425	$	190,748
(1) Included in accounts receivable in the condensed consolidated balance sheet. Amounts shown net of reserve for bad debts.