Pension and Other Post-retirement Benefit Plans (Details Narrative) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Deferred compensation	$ 1,499,264	$ 1,849,019
Post-retirement benefits description	In addition to the Company's defined benefit pension plans, the Company offers post-retirement benefits comprised of medical and life coverages to its employees who meet certain age and service criteria. Currently, the retirees under age 65 pay 60% of their health care premium until Medicare benefits commence at age 65. After age 65, Medicare supplemental coverage is offered with Company payment of the premium. For union participants who retire on or after September 2, 1992, the Company cost for post-retirement benefits is contractually limited and will not exceed $150 per month. This contract is in effect until April 2, 2015. The monthly benefit for all non-union employees, regardless of retirement date, shall not exceed $150. In addition, the Company offers limited life insurance coverage to active employees and retirees. The post-retirement benefit plan is not funded. The Company accrues the cost of providing post-retirement benefits during the active service period of the employee.
Cost of benefits, as utilized in calculation of estimated liability description	For measurement purposes, a 9.5% annual rate of increase in the per capita cost of covered benefits (health care cost trend rate) was assumed for 2012. The rate is assumed to increase by 6.5% each year thereafter. A 1% increase in the actual health care cost trend would result in approximately a 4.1% increase in the service and interest cost components of the annual net periodic post-retirement benefit cost and a 4.1% increase in the accumulated post-retirement benefit obligation. A 1% decrease in the actual health care cost trend would result in approximately a 3.6% decrease in the service and interest cost components of the annual net periodic post-retirement benefit cost and a 3.6% decrease in the accumulated post-retirement benefit obligation.
Deferred Pension Cost - ratemaking	1,545,790	1,207,028
Description of Corning Natural Gas Corporation Employee Savings Plan	The Company also maintains the Corning Natural Gas Corporation Employee Savings Plan (the Savings Plan). All employees of the Company who work for more than 1,000 hours per year and who have completed one year of service may enroll in the Savings Plan at the beginning of each calendar quarter. Under the Savings Plan, participants may contribute up to 50% of their wages. For all employees, the Company will match one-half of the participant’s contribution up to a total of 50% of the participant's contribution up to a total of 6% of the participant's wages.
Company Contribution to Savings Plan	75,005	75,963	66,969
Pension Costs
Pension Expense - ratemaking	1,173,710	1,285,000	1,190,949
Deferred Pension Cost - ratemaking	375,415	661,786	1,040,618
Regulatory Receivable (liability)	197,477	172,354	142,214
Rabbi Trust
Fair value of plan assets at end of year	2,220,536	2,216,083	2,315,685
Stock included in deferred compensation plan	51,185	51,185	51,185
Deferred compensation	$ 1,499,264	$ 1,849,019	$ 1,938,106