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INFORMATION RELATING TO THE CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Details) - USD ($)
$ in Thousands
9 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Supplemental disclosure of cash flow information:    
Interest $ 235 $ 489
Income taxes paid 0 (103)
Supplemental disclosure of non-cash investing and financing activities:    
Note receivable for sale of investment 907 0
Oil and natural gas    
Supplemental disclosures of cash flow information:    
Increase (Decrease) in capital expenditure accruals related to oil and natural gas exploration and development 95 (1,329)
Increase (Decrease) in capital expenditure accruals related to oil and natural gas asset retirement obligations $ 938 $ 58