Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Income Statement [Abstract]
Utility operating revenues	$ 4,913,295	$ 5,851,785
Natural gas purchased	1,997,114	2,497,048
Gross margin	2,916,181	3,354,737
Cost and expense
Operating and maintenance expense	1,020,411	1,696,494
Taxes other than income taxes	469,236	417,917
Depreciation	419,751	293,458
Other deductions, net	266,577	78,491
Total costs and expenses	2,175,975	2,486,360
Utility operating income	740,206	868,377
Other income and (expense)
Interest expense	(251,359)	(208,642)
Non-utility expense	(2,820)	(2,770)
Other income	266,920	10,703
Investment income	24,318	143,958
Rental income	12,138	12,138
[NonoperatingIncomeExpense]	49,197	(44,613)
Net income from utility operations, before income tax	789,403	823,764
Income tax benefit (expense), current	237,432	(42,367)
Income tax benefit (expense), deferred	(616,031)	(268,990)
Total tax (expense)	(378,599)	(311,357)
Net income	410,804	512,407
Other comprehensive income (loss)	(136,179)	(163,707)
Total comprehensive income (loss)	$ 274,625	$ 348,700
Weighted average earnings per share
basic:	$ 0.23	$ 0.30
diluted:	$ 0.22	$ 0.29
Average shares outstanding - basic	1,815,634	1,721,537
Average shares outstanding - diluted	1,829,486	1,740,852