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INFORMATION RELATING TO THE CONSOLIDATED STATEMENTS OF CASH FLOWS (Details) (USD $) | 9 Months Ended
--- | ---
Jun. 30, 2012 | Jun. 30, 2011
Supplemental disclosures of cash flow information: |  |
Interest | $ 586,000 | $ 742,000
Income taxes | 455,000 | 1,564,000
Supplemental disclosure of non-cash investing and financing activities: |  |
Long-term debt borrowings refinanced |  | 12,500,000
Oil and natural gas |  |
Supplemental disclosures of cash flow information: |  |
Increase (decrease) in capital expenditure accruals related to oil and gas exploration and development | (2,041,000) | 1,599,000
Increase (decrease) in capital expenditure accruals related to oil and gas asset retirement obligations | $ 29,000 | $ 126,000

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