Fair Value Measurements (Details) (USD $)	Sep. 30, 2013
Fair Value Measurements [Abstract]
Fair value and carrying value of debt	$ 7,200,000
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity risk management assets	62,000
Available for sale securities	75,000
Total assets	137,000
Commodity risk management liability	647,000
Other accrued liabilities	746,000	[1]
Total	1,393,000
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity risk management assets	0
Available for sale securities	75,000
Total assets	75,000
Commodity risk management liability	0
Other accrued liabilities	0	[1]
Total	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity risk management assets	62,000
Available for sale securities	0
Total assets	62,000
Commodity risk management liability	647,000
Other accrued liabilities	0	[1]
Total	647,000
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity risk management assets	0
Available for sale securities	0
Total assets	0
Commodity risk management liability	0
Other accrued liabilities	746,000	[1]
Total	$ 746,000

[1] Other accrued liabilities is the company's liability for the executive retirement program.