Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2013	Sep. 30, 2012
Current assets
Allowance for uncollectible accounts	$ 291,082	$ 209,615
Regulatory assets
Accumulated amortization of debt issuance cost	$ 512,677	$ 489,522
Common stockholders' equity
Common stock, par value	$ 5.00	$ 5.00
Commn stock, authorized shares	3,500,000	3,500,000
Common stock, shares outstanding	2,236,117	2,220,271
Common stock, shares issued	2,220,271	2,220,271