Condensed Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement [Abstract]
Utility operating revenues	$ 5,387,140	$ 3,806,388	$ 20,340,840	$ 16,862,351
Natural gas purchased	1,752,896	915,381	7,721,482	6,321,747
Gross margin	3,634,244	2,891,007	12,619,358	10,540,604
Cost and expense
Operating and maintenance expense	1,687,647	1,709,284	5,318,720	4,566,258
Taxes other than income taxes	430,669	442,736	1,307,617	1,406,200
Depreciation	611,608	427,837	1,652,840	1,266,429
Other deductions, net	32,872	76,440	318,038	373,644
Total costs and expenses	2,762,796	2,656,297	8,597,215	7,612,531
Utility operating income	871,448	234,710	4,022,143	2,928,073
Other income and (expense)
Interest expense	(227,730)	(224,848)	(712,314)	(724,969)
Non-utility expense	(7,247)	(7,492)	(23,189)	(9,292)
Other income	2,063	642	55,168	290,533
Investment income	21,936	18,703	101,394	91,719
Non-utility income (loss) from joint ventures	(81,987)		(39,268)
Rental income	12,138	12,138	36,414	36,414
Net income from operations, before income tax	590,621	33,853	3,440,348	2,612,478
Income tax benefit (expense), current	60,633	335,425	(537,247)	124,582
Income tax benefit (expense), deferred	(263,162)	(300,080)	(644,663)	(1,119,902)
Total tax (expense)	(202,529)	35,345	(1,181,910)	(995,320)
Net income	388,092	69,198	2,258,438	1,617,158
Other comprehensive (loss)
Pension adjustment, net of tax	(94,129)	(106,488)	(282,386)	(410,640)
Net unrealized gain (loss) on securities available for sale	(39,315)	(27,261)	(33,830)	104,094
Total other comprehensive (loss)	(133,444)	(133,749)	(316,216)	(306,546)
Total comprehensive income	$ 254,648	$ (64,551)	$ 1,942,222	$ 1,310,612
Weighted average earnings per share
Basic:	$ 0.17	$ 0.04	$ 1.01	$ 0.84
Diluted:	$ 0.17	$ 0.03	$ 1.01	$ 0.84
Average shares outstanding - basic	2,239,906	1,972,193	2,235,386	1,918,798
Average shares outstanding - diluted	2,250,753	1,983,937	2,245,987	1,931,652