Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Statement [Abstract]
Utility operating revenues	$ 3,806,388	$ 4,750,563	$ 16,862,351	$ 20,175,835
Natural gas purchased	915,381	1,861,956	6,321,747	9,134,862
Gross margin	2,891,007	2,888,607	10,540,604	11,040,973
Cost and expense
Operating and maintenance expense	1,709,284	1,884,517	4,566,258	5,500,405
Taxes other than income taxes	442,736	447,042	1,406,200	1,337,278
Depreciation	427,837	407,641	1,266,429	1,028,002
Other deductions, net	76,440	85,786	373,644	195,361
Total costs and expenses	2,656,297	2,824,986	7,612,531	8,061,046
Utility operating income	234,710	63,621	2,928,073	2,979,927
Other income and (expense)
Interest expense	(224,848)	(216,546)	(724,969)	(670,225)
Non-utility expense	(7,492)	(2,058)	(9,292)	(7,512)
Other income	642	1,591	290,533	12,943
Investment income	18,703	21,846	91,719	176,851
Rental income	12,138	12,138	36,414	36,414
Net income from utility operations, before income tax	33,853	(119,408)	2,612,478	2,528,398
Income tax benefit (expense), current	335,425	(1,800,484)	124,582	(2,617,893)
Income tax benefit (expense), deferred	(300,080)	1,848,227	(1,119,902)	1,699,096
Total tax (expense)	35,345	47,743	(995,320)	(918,797)
Net income	69,198	(71,665)	1,617,158	1,609,601
Other comprehensive (loss)
Pension adjustment, net of tax	(106,488)	(124,599)	(410,640)	(373,796)
Net unrealized gain (loss) on securities available for sale	(27,261)	(23,954)	104,094	(33,021)
Total other comprehensive (loss)	(133,749)	(148,553)	(306,546)	(406,817)
Total comprehensive income	$ (64,551)	$ (220,218)	$ 1,310,612	$ 1,202,784
Weighted average earnings per share
basic:	$ 0.04	$ 0.04	$ 0.84	$ 0.93
diluted:	$ 0.03	$ 0.04	$ 0.84	$ 0.92
Average shares outstanding - basic	1,972,193	1,747,035	1,918,798	1,736,357
Average shares outstanding - diluted	1,983,937	1,772,739	1,931,652	1,756,123