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INFORMATION RELATING TO THE CONSOLIDATED STATEMENTS OF CASH FLOWS (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Increase (decrease) from changes in:    
Receivables $ (1,763) $ (814)
Income tax receivable 15 457
Other current assets (531) (920)
Accounts payable 110 (746)
Accrued compensation (48) 668
Other current liabilities 1,190 (796)
Decrease from changes in current assets and liabilities (1,027) (2,151)
Supplemental disclosure of cash flow information:    
Income taxes refunded, net (98) (303)
Supplemental disclosure of non-cash investing and financing activities:    
Canadian income tax withheld on proceeds from the sale of oil and natural gas properties 0 598
Supplemental disclosures of cash flow information:    
Increase (decrease) in capital expenditure accruals related to oil and natural gas asset retirement obligations 2,703 811
Oil and natural gas    
Supplemental disclosures of cash flow information:    
Increase in capital expenditure accruals related to oil and natural gas exploration and development 882 346
Increase (decrease) in capital expenditure accruals related to oil and natural gas asset retirement obligations $ 2,703 $ 811