Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2012	Sep. 30, 2011	Mar. 31, 2011
Current assets
Allowance for uncollectible accounts	$ 28,259	$ 46,080	$ 47,847
Regulatory assets
Accumulated amortization of debt issuance cost	$ 466,456	$ 443,854	$ 420,249
Common stockholders' equity
Common stock, par value	$ 5.00	$ 5.00	$ 5.00
Commn stock, authorized shares	3,500,000	3,500,000	3,500,000
Common stock, shares outstanding	1,970,818	1,787,769	1,741,899
Common stock, shares issued	1,970,818	1,787,769	1,741,899